Nvm. They were the files in public_html/svgfiles, but the problem came from the fact that an absolute path to the main tool was used, and called from the beta tool, which resulted in obvious permission errors.
Using relative paths solved the issue.
Thanks for the response.

Hi, I'm having an issue porting a cron task we used to the new system.
The task needs to remove old files, but there's a permission error and it doesn't have the right to rm any of them.
I scheduled the tool using the tool account.
What can I do, where should I start ?

I did figure it out by telling .lighttpd.conf to use python3 to handle the .py requests.

Thanks. I restarted the webservice and it seems to work better (no 403, and the subpages have the js working properly, and the php subpages are accessible).
There is an error with a place where we call a python file from the js, and the result doesn't seem to be what it was before - but I'm not sure how it did work, either.
The thing is that we're making a POST ajax request to the python file. Before, it executed the file and returned what the file printed (the name of a generated SVG file). Now, it returns the entire file...
I guess I'll figure it out.

Hi, I'm associated with Slashme for maintaining ParliamentDiagram.
I understand the tool has been disabled, but I don't quite understand the context and reasons about it, or what I need to do in order to migrate (or where to migrate to).
What's most surprising to me, is that a sort of copy of the parliamentdiagram tool, called parliamentarch, is still standing and working quite well, despite the fact that I didn't do anything to maintain it throug that migration thingy.
Edit: actually it doesn't seem to work either, but it's nonetheless considerably less broken.

I think you meant it has Python 2 implementation which should be dropped.
Indeed, the methods inherited from MutableMapping do the trick, so the three methods defined in the Request class should simply be removed.