So I tried a new version with V14, and I tested it in a VM as suggested here by @Mamie .
I got an asking screen during the configuration step :
This may be where the testing bot is stopped. Thus the auto tests can’t validate.
Strangely, the current master branch does not print this screen. I don’t understand why. I am currently stuck here, I don’t know what to do to prevent this screen from popping.
I also tested by installing the current V12 version, then upgrade it to V14, and that works.
PR can be found here : Upgrade to V14 by Dazeilad · Pull Request #11 · YunoHost-Apps/openproject_ynh · GitHub