diff --git a/changelog/unreleased/fix-remove-group-from-share.md b/changelog/unreleased/fix-remove-group-from-share.md
new file mode 100644
index 00000000000..4d9013558c5
--- /dev/null
+++ b/changelog/unreleased/fix-remove-group-from-share.md
@@ -0,0 +1,6 @@
+Bugfix: Fix nil pointer when removing groups from space
+
+We fixed the nil pointer when removing groups from space via graph
+
+https://github.com/cs3org/reva/pull/4635
+https://github.com/owncloud/ocis/issues/8768
diff --git a/internal/grpc/services/gateway/storageprovider.go b/internal/grpc/services/gateway/storageprovider.go
index 781295963da..1541fff8745 100644
--- a/internal/grpc/services/gateway/storageprovider.go
+++ b/internal/grpc/services/gateway/storageprovider.go
@@ -250,14 +250,14 @@ func (s *svc) ListStorageSpaces(ctx context.Context, req *provider.ListStorageSp
 	for _, f := range req.Filters {
 		switch f.Type {
 		case provider.ListStorageSpacesRequest_Filter_TYPE_ID:
-			sid, spid, oid, err := storagespace.SplitID(f.GetId().OpaqueId)
+			sid, spid, oid, err := storagespace.SplitID(f.GetId().GetOpaqueId())
 			if err != nil {
 				continue
 			}
 			filters["storage_id"], filters["space_id"], filters["opaque_id"] = sid, spid, oid
 		case provider.ListStorageSpacesRequest_Filter_TYPE_OWNER:
-			filters["owner_idp"] = f.GetOwner().Idp
-			filters["owner_id"] = f.GetOwner().OpaqueId
+			filters["owner_idp"] = f.GetOwner().GetIdp()
+			filters["owner_id"] = f.GetOwner().GetOpaqueId()
 		case provider.ListStorageSpacesRequest_Filter_TYPE_SPACE_TYPE:
 			filters["space_type"] = f.GetSpaceType()
 		case provider.ListStorageSpacesRequest_Filter_TYPE_USER:
@@ -339,7 +339,7 @@ func (s *svc) DeleteStorageSpace(ctx context.Context, req *provider.DeleteStorag
 		_, purge = opaque.Map["purge"]
 	}
 
-	rid, err := storagespace.ParseID(req.Id.OpaqueId)
+	rid, err := storagespace.ParseID(req.GetId().GetOpaqueId())
 	if err != nil {
 		return &provider.DeleteStorageSpaceResponse{
 			Status: status.NewStatusFromErrType(ctx, fmt.Sprintf("gateway could not parse space id %s", req.GetId().GetOpaqueId()), err),
@@ -361,7 +361,7 @@ func (s *svc) DeleteStorageSpace(ctx context.Context, req *provider.DeleteStorag
 		}, nil
 	}
 
-	id := &provider.ResourceId{OpaqueId: req.Id.OpaqueId}
+	id := &provider.ResourceId{OpaqueId: req.GetId().GetOpaqueId()}
 	s.providerCache.RemoveListStorageProviders(id)
 
 	if dsRes.Status.Code != rpc.Code_CODE_OK {
@@ -1221,11 +1221,11 @@ func unwrap(ref *provider.Reference, mountPoint string, root *provider.ResourceI
 
 	return &provider.Reference{
 		ResourceId: &provider.ResourceId{
-			StorageId: ref.ResourceId.StorageId,
-			SpaceId:   ref.ResourceId.SpaceId,
-			OpaqueId:  ref.ResourceId.OpaqueId,
+			StorageId: ref.GetResourceId().GetStorageId(),
+			SpaceId:   ref.GetResourceId().GetSpaceId(),
+			OpaqueId:  ref.GetResourceId().GetOpaqueId(),
 		},
-		Path: ref.Path,
+		Path: ref.GetPath(),
 	}
 }
 
diff --git a/internal/grpc/services/gateway/usershareprovider.go b/internal/grpc/services/gateway/usershareprovider.go
index fb3057638f4..25a1a2965d4 100644
--- a/internal/grpc/services/gateway/usershareprovider.go
+++ b/internal/grpc/services/gateway/usershareprovider.go
@@ -45,9 +45,9 @@ func (s *svc) CreateShare(ctx context.Context, req *collaboration.CreateShareReq
 }
 
 func (s *svc) RemoveShare(ctx context.Context, req *collaboration.RemoveShareRequest) (*collaboration.RemoveShareResponse, error) {
-	key := req.Ref.GetKey()
+	key := req.GetRef().GetKey()
 	if !s.c.UseCommonSpaceRootShareLogic && shareIsSpaceRoot(key) {
-		return s.removeSpaceShare(ctx, key.ResourceId, key.Grantee)
+		return s.removeSpaceShare(ctx, key.GetResourceId(), key.GetGrantee())
 	}
 	return s.removeShare(ctx, req)
 }
@@ -149,7 +149,7 @@ func (s *svc) updateShare(ctx context.Context, req *collaboration.UpdateShareReq
 		if updateGrantStatus.Code != rpc.Code_CODE_OK {
 			return &collaboration.UpdateShareResponse{
 				Status: updateGrantStatus,
-				Share:  res.Share,
+				Share:  res.GetShare(),
 			}, nil
 		}
 	}
@@ -835,11 +835,11 @@ func isEqualGrantee(a, b *provider.Grantee) bool {
 	var aID, bID string
 	switch a.Type {
 	case provider.GranteeType_GRANTEE_TYPE_GROUP:
-		aID = a.GetGroupId().OpaqueId
-		bID = b.GetGroupId().OpaqueId
+		aID = a.GetGroupId().GetOpaqueId()
+		bID = b.GetGroupId().GetOpaqueId()
 	case provider.GranteeType_GRANTEE_TYPE_USER:
-		aID = a.GetUserId().OpaqueId
-		bID = b.GetUserId().OpaqueId
+		aID = a.GetUserId().GetOpaqueId()
+		bID = b.GetUserId().GetOpaqueId()
 	}
 	return aID == bID
 }