Include_relative : Could not locate the included file

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1

My GitHub Pages can’t work since Jekyll has been updated from 3.7.4 to 3.8.5.

File shu-xue-fu-hao-1.md is included in 2018-06-16-shu-xue-fu-hao.md by:

{% include_relative shu-xue-fu-hao-1.md %}

Both files are in _post.

Looks like tag include_relative tries to find included file in the wrong dirctory.

fht@DESKTOP-5831MTI:/mnt/d/Git/fht/math$ bundle exec jekyll serve
Configuration file: /mnt/d/Git/fht/math/_config.yml
   GitHub Metadata: No GitHub API authentication could be found. Some fields may be missing or have incorrect data.
            Source: /mnt/d/Git/fht/math
       Destination: /mnt/d/Git/fht/math/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
  Liquid Exception: Could not locate the included file 'shu-xue-fu-hao-1.md' in any of ["/mnt/d/Git/fht/math/_posts/2018-06-16-shu-xue-fu-hao.md"]. Ensure it exists in one of those directories and is not a symlink as those are not allowed in safe mode. in /mnt/d/Git/fht/math/_posts/2018-06-16-shu-xue-fu-hao.md/#excerpt
  Liquid Exception: Could not locate the included file 'shu-xue-fu-hao-1.md' in any of ["/mnt/d/Git/fht/math/_posts/2018-06-16-shu-xue-fu-hao.md"]. Ensure it exists in one of those directories and is not a symlink as those are not allowed in safe mode. in /_layouts/default.html
jekyll 3.8.5 | Error:  Could not locate the included file 'shu-xue-fu-hao-1.md' in any of ["/mnt/d/Git/fht/math/_posts/2018-06-16-shu-xue-fu-hao.md"]. Ensure it exists in one of those directories and is not a symlink as those are not allowed in safe mode.
fht@DESKTOP-5831MTI:/mnt/d/Git/fht/math$