Issues with newer versions of hugo

[LucasSymons]

Describe the bug
I am having issues with newer versions of Hugo as they look to be breaking the site.
My 404 and about me both fail to render correctly and have default content or missing some parts.

To Reproduce
edit about and 404 .md files under content/posts and run hugo build. I use hugo --cleanDestinationDir --forceSyncStatic --gc --minify --templateMetrics --templateMetricsHints --verbose

Expected behavior
all content of the 404 and about pages should render in the files.

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
If I manage to work it out I will create a pull request for everyone, so even some hints that might help would be great.

you can also view my 404 and about pages in the source below and check my site lucassymons.net to see the issue.

Your project
https://bitbucket.org/LucasSymons/lucassymons.net

Hugo version
Hugo Static Site Generator v0.62.0/extended linux/amd64

[UtkarshVerma]

Well, I'm dropping support for this theme due to time constraints, therefore I'm afraid you'll have to switch to other themes.