Hi Rashida! I'm having close to the same problem, but with "blocks" only. Exactly the same issue on two different sites, albeit on the same hosting account. All else is working. Have repopulated the license and email in both. PHP 7.4 (have tried 7.3 and 8.0). Pagebuilder 3.86 on one Pagebuilder 3.7.15 on the other, but updating that to 3.8.6 didn't resolve the issue. I've rebooted. Subsequent to above, upgraded the 3.7.15 to 3.8.6 to no effect. I've rebooted, emptied caches, checked other trouble shooting issues you've given to others, attempted using Firebox browser (vs Safari). Nope, I'm still here. :-) As you will see when you try the sites, there is a syntax error in the javascript console ("cannot parse"), which is identical (ie. the same code line) in both sites. But understanding what causes it, or how to fix it are both well beyond my pay grade.
All other aspects of Helix Template and SPP appear to be working. Both sites are very simple installations & sites, (one is a clean fresh Joomla install), no other extensions or templates outside of Helix Ultimate and Pagebuilder.
Unfortunately it's been a while since I used SPP, so can't tell you if this issue is new or old.