Hi,
Thanks for the access. I have cleared the Joomla cache: https://prnt.sc/xqUr7AAU2EH_
And it seems all is working now: https://prnt.sc/BJ2SeIOScLzE
I have made a page named "testF" to test those layouts and blocks and they are got imported, so left the page for you to check.
Moreover, would like to request you to recheck the technical requirements and PHP configuration and keep the recommended settings there:
https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-4/technical-requirements
As I can see from your system information many things are not upto the mark, such as https://prnt.sc/vVdoqpwlLeqQ
Lower value may cause performance issues.
Best Regards