You need to contact your hosting provider because the error tells that Failed opening required /wp-content/plugins/et-core-plugin/app/controllers/shortcodes/portfolio.php.
As a rule, this happens if the file does not exist but it’s not your case https://prnt.sc/4hLIINh_csW_ so, then something is wrong with the file permissions. Hosting support needs to take a look at this carefully.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.