diff --git a/Libraries/Image/RCTImageLoader.mm b/Libraries/Image/RCTImageLoader.mm
index 6da126972aa7df..e356fb2d79cccd 100644
--- a/Libraries/Image/RCTImageLoader.mm
+++ b/Libraries/Image/RCTImageLoader.mm
@@ -314,17 +314,17 @@ - (void)setImageCache:(id<RCTImageCache>)cache
 
 #pragma mark - RCTImageLoaderProtocol 2/3
 
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                  callback:(RCTImageLoaderCompletionBlock)callback
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                           callback:(RCTImageLoaderCompletionBlock)callback
 {
     return [self loadImageWithURLRequest:imageURLRequest
                                 priority:RCTImageLoaderPriorityImmediate
                                 callback:callback];
 }
 
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                  priority:(RCTImageLoaderPriority)priority
-                                                  callback:(RCTImageLoaderCompletionBlock)callback {
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                           priority:(RCTImageLoaderPriority)priority
+                                                           callback:(RCTImageLoaderCompletionBlock)callback {
     return [self loadImageWithURLRequest:imageURLRequest
                                     size:CGSizeZero
                                    scale:1
@@ -336,14 +336,14 @@ - (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)image
                          completionBlock:callback];
 }
 
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                      size:(CGSize)size
-                                                     scale:(CGFloat)scale
-                                                   clipped:(BOOL)clipped
-                                                resizeMode:(RCTResizeMode)resizeMode
-                                             progressBlock:(RCTImageLoaderProgressBlock)progressBlock
-                                          partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
-                                           completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                               size:(CGSize)size
+                                                              scale:(CGFloat)scale
+                                                            clipped:(BOOL)clipped
+                                                         resizeMode:(RCTResizeMode)resizeMode
+                                                      progressBlock:(RCTImageLoaderProgressBlock)progressBlock
+                                                   partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
+                                                    completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
 {
     return [self loadImageWithURLRequest:imageURLRequest
                                     size:size
@@ -356,15 +356,15 @@ - (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)image
                          completionBlock:completionBlock];
 }
 
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                      size:(CGSize)size
-                                                     scale:(CGFloat)scale
-                                                   clipped:(BOOL)clipped
-                                                resizeMode:(RCTResizeMode)resizeMode
-                                                  priority:(RCTImageLoaderPriority)priority
-                                             progressBlock:(RCTImageLoaderProgressBlock)progressBlock
-                                          partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
-                                           completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                               size:(CGSize)size
+                                                              scale:(CGFloat)scale
+                                                            clipped:(BOOL)clipped
+                                                         resizeMode:(RCTResizeMode)resizeMode
+                                                           priority:(RCTImageLoaderPriority)priority
+                                                      progressBlock:(RCTImageLoaderProgressBlock)progressBlock
+                                                   partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
+                                                    completionBlock:(RCTImageLoaderCompletionBlock)completionBlock
 {
   RCTImageURLLoaderRequest *request = [self loadImageWithURLRequest:imageURLRequest
                                                                size:size
diff --git a/Libraries/Image/RCTImageLoaderProtocol.h b/Libraries/Image/RCTImageLoaderProtocol.h
index f14c196ebb296a..366fb7b57ceb6a 100644
--- a/Libraries/Image/RCTImageLoaderProtocol.h
+++ b/Libraries/Image/RCTImageLoaderProtocol.h
@@ -68,14 +68,14 @@ typedef NS_ENUM(NSUInteger, RCTImageLoaderPriority) {
  * Loads the specified image at the highest available resolution.
  * Can be called from any thread, will call back on an unspecified thread.
  */
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                  callback:(RCTImageLoaderCompletionBlock)callback;
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                           callback:(RCTImageLoaderCompletionBlock)callback;
 /**
  * As above, but includes download `priority`.
  */
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                  priority:(RCTImageLoaderPriority)priority
-                                                  callback:(RCTImageLoaderCompletionBlock)callback;
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                           priority:(RCTImageLoaderPriority)priority
+                                                           callback:(RCTImageLoaderCompletionBlock)callback;
 
 /**
 * As above, but includes target `size`, `scale` and `resizeMode`, which are used to
@@ -86,14 +86,14 @@ typedef NS_ENUM(NSUInteger, RCTImageLoaderPriority) {
 * It is meant to be called repeatedly while loading the image as higher quality versions are decoded,
 * for instance with progressive JPEGs.
 */
-- (RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
-                                                      size:(CGSize)size
-                                                     scale:(CGFloat)scale
-                                                   clipped:(BOOL)clipped
-                                                resizeMode:(RCTResizeMode)resizeMode
-                                             progressBlock:(RCTImageLoaderProgressBlock)progressBlock
-                                          partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
-                                           completionBlock:(RCTImageLoaderCompletionBlock)completionBlock;
+- (nullable RCTImageLoaderCancellationBlock)loadImageWithURLRequest:(NSURLRequest *)imageURLRequest
+                                                               size:(CGSize)size
+                                                              scale:(CGFloat)scale
+                                                            clipped:(BOOL)clipped
+                                                         resizeMode:(RCTResizeMode)resizeMode
+                                                      progressBlock:(RCTImageLoaderProgressBlock)progressBlock
+                                                   partialLoadBlock:(RCTImageLoaderPartialLoadBlock)partialLoadBlock
+                                                    completionBlock:(RCTImageLoaderCompletionBlock)completionBlock;
 
 /**
  * Finds an appropriate image decoder and passes the target `size`, `scale` and
diff --git a/Libraries/Image/RCTImageURLLoader.h b/Libraries/Image/RCTImageURLLoader.h
index a1f2144e47155c..d950b46f745f70 100644
--- a/Libraries/Image/RCTImageURLLoader.h
+++ b/Libraries/Image/RCTImageURLLoader.h
@@ -35,7 +35,7 @@ typedef dispatch_block_t RCTImageLoaderCancellationBlock;
  * has finished. The method should also return a cancellation block, if
  * applicable.
  */
-- (RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL
+- (nullable RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL
                                               size:(CGSize)size
                                              scale:(CGFloat)scale
                                         resizeMode:(RCTResizeMode)resizeMode
diff --git a/Libraries/Image/RCTLocalAssetImageLoader.mm b/Libraries/Image/RCTLocalAssetImageLoader.mm
index 8669ad3615d82c..0387af805e97d9 100644
--- a/Libraries/Image/RCTLocalAssetImageLoader.mm
+++ b/Libraries/Image/RCTLocalAssetImageLoader.mm
@@ -41,13 +41,13 @@ - (BOOL)shouldCacheLoadedImages
   return NO;
 }
 
- - (RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL
-                                               size:(CGSize)size
-                                              scale:(CGFloat)scale
-                                         resizeMode:(RCTResizeMode)resizeMode
-                                    progressHandler:(RCTImageLoaderProgressBlock)progressHandler
-                                 partialLoadHandler:(RCTImageLoaderPartialLoadBlock)partialLoadHandler
-                                  completionHandler:(RCTImageLoaderCompletionBlock)completionHandler
+ - (nullable RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL
+                                                        size:(CGSize)size
+                                                       scale:(CGFloat)scale
+                                                  resizeMode:(RCTResizeMode)resizeMode
+                                             progressHandler:(RCTImageLoaderProgressBlock)progressHandler
+                                          partialLoadHandler:(RCTImageLoaderPartialLoadBlock)partialLoadHandler
+                                           completionHandler:(RCTImageLoaderCompletionBlock)completionHandler
 {
   UIImage *image = RCTImageFromLocalAssetURL(imageURL);
   if (image) {
@@ -60,7 +60,7 @@ - (RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL
     RCTLogWarn(@"%@", message);
     completionHandler(RCTErrorWithMessage(message), nil);
   }
-  
+
   return nil;
 }
 
diff --git a/Libraries/Network/RCTNetworkTask.mm b/Libraries/Network/RCTNetworkTask.mm
index 1cc625298e32f1..5b07e2cb686501 100644
--- a/Libraries/Network/RCTNetworkTask.mm
+++ b/Libraries/Network/RCTNetworkTask.mm
@@ -99,12 +99,6 @@ - (BOOL)validateRequestToken:(id)requestToken
 {
   BOOL valid = YES;
   if (_requestToken == nil) {
-    if (requestToken == nil) {
-      if (RCT_DEBUG) {
-        RCTLogError(@"Missing request token for request: %@", _request);
-      }
-      valid = NO;
-    }
     _requestToken = requestToken;
   } else if (![requestToken isEqual:_requestToken]) {
     if (RCT_DEBUG) {