build warning and missing about page for hugo version 0.55

[jdhao]

After updating to latest hugo version (version 0.55), when I run hugo server, there are some warning messages:

Building sites … WARN 2019/04/17 00:34:25 Page's .Hugo is deprecated and will be removed in a future release. Use the global hugo function.
WARN 2019/04/17 00:34:25 Page's .RSSLink is deprecated and will be removed in a future release. Use the Output Format's link, e.g. something like:
    {{ with .OutputFormats.Get "RSS" }}{{ . RelPermalink }}{{ end }}.
WARN 2019/04/17 00:34:25 Page's .URL is deprecated and will be removed in a future release. Use .Permalink or .RelPermalink. If what you want is the front matter URL value, use .Params.url.

In the generated blog, the About is missing. This may be due to the incompatible behaviour of this theme and latest hugo?

[mandarvaze]

@jdhao Missing About page may be unrelated. I see About page fine in spite of the warnings.

[jdhao]

It is related for some time, at least when I created this issue. After some update of Hugo, the warning message persists, but the About page appears now.