I added QuChemPedIA a year ago, but my credits do not show up in my stats. Likewise, I do not show up in QuChemPedIA's BAM User list, however, I am listed at their website. I also notice when I load my cross-project certificate on the site I get the following errors:

Notice: Undefined property: BoincUser::$projects in /home/boincadmin/projet/html/user/cert_all.php on line 42

Warning: Invalid argument supplied for foreach() in /home/boincadmin/projet/html/user/cert_all.php on line 42

Notice: Undefined property: BoincUser::$projects in /home/boincadmin/projet/html/user/cert_all.php on line 77

Warning: Invalid argument supplied for foreach() in /home/boincadmin/projet/html/user/cert_all.php on line 77

I am suspecting the two are related. Initially, I thought it was an issue with my CPID, but the CPID is the same on my projects and I have running all my projects in a single host to make sure everything is synced up.

This is to do with GDPR.

Most if not all projects require you to explicitly allow export of data to other sites. Unfortunately, where you tick to allow this permission is not in exactly the same place on each project. A good start is on your account page, sometimes it is there, sometimes you have to go to account preferences or such like.

I suspect I accidentally unselected it when I was setting up preferences the first time, because I never had to do this with any other project. Yet, issue has been resolved per your answer. Thank You. This one really stumped me, since I can usually find a solution in this forum or the forums of Boinc projects.