Help with project based on STK code (debugging)

[rubberduck]

i work on an open-source game that is based on Supertuxkart Code.

If you want to help, you should know the STK code well, i have the problem that rendering does not work.
Here is a link to a topic in the STK area of this forum with more description and a link to the repo.

viewtopic.php?f=17&t=6551