Error: A pre-v6.0 template issue

[zero-pytagoras]

I am using darkslide:

• version: 6.0.0
• py_version: python3.12
• OS: debian12
  I have used the same simple theme since version 5.1 and never seen this error:

Error: A pre-v6.0 template file has been found at '/home/aschapelle/Projects/docker-shallow-dive/99_misc/.simple/base.html'. You need to rename it to template.html and use the new css_assets/js_assets variables instead.

I have changed the name to template.html, but then the error, changes to :

Error: 'css' is undefined

I am guessing that is has something to do with file structure.
any guidance how should I fix it ?

[ionelmc]

I guess you need to use css_assets instead of css.

[zero-pytagoras]

tried that but then it same error Error: 'css_assets' is undefined
I was able to fix it, but seems to be the theme error as well, any tips on how to handle it ?

[ionelmc]

Hard to say what's going on exactly. I need to see your template at the very least to be able to reproduce the problem.

[zero-pytagoras]

here is the theme: https://github.com/Kaljurand/landslide-themes