Did you make any changes in user roles? Make sure that your account is set like administrator https://kinsta.com/knowledgebase/sorry-you-are-not-allowed-to-access-this-page-error-in-wordpress/#4-make-sure-youre-an-administrator
Besides, I see a lot of warnings in your debug.log. Some of them are related to server configuration (check the screenshot in the private content area).
Contact your hosting and fix the mentioned warmings.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.