Theme is not showing up in the RTD build documentation

[miroi]

Hello,

this is my RTD documentation https://diracprogram-documentation.readthedocs.io/en/latest/
(from https://readthedocs.org/projects/diracprogram-documentation/builds/26684900/ )

but the theme is not showing up. It has to be the like https://diracprogram.org/doc/master/ .

The log file gives no warning/error for "make VERBOSE=1 html" documentation generation.

Here is the doc/conf.py file https://gitlab.com/dirac/dirac/-/blob/master/doc/conf.py?ref_type=heads .

Any help why on RTD server the documentation is not built properly ? On my local PC, and our remote documentation server https://diracprogram.org/doc/master/ the build is fine wrt to the theme.