Failed build for: jfvelte - Galaxy S4 Value Edition (GT-I9515/L)

And one of the things that changed was to move to Python 3 instead of Python 2

The error in your other thread was

File “/usr/local/bin/repo”, line 51
def print(self, *args, **kwargs):
^
> SyntaxError: invalid syntax
> Device s5neolte not found. Attempting to retrieve device repository from LineageOS 

So it looks like the version of repo you have is not compatible with Python 3, which ties in with the repo-20240106.log message

… A new version of repo (2.40) is available.
… You should upgrade soon:
cp /srv/src/R/.repo/repo/repo /usr/local/bin/repo

Have you tried updating your version of repo - as the message suggests?
cp /srv/src/R/.repo/repo/repo /usr/local/bin/repo