Hi,
Thank you for writing to us.
Can you please try after increasing your server resource limit to check as we are not facing any issues in our testing environment?
Also, Here is what you can do to check further:
1. Please try switching to another theme, like Twenty Twenty-one, and check whether the issue persists or not. If not, then it is the theme that is causing the error.
2. Deactivate all plugins temporarily except WPDM and see if that solves the problem. Then, activate the plugins one by one to see which plugin is causing the problem.
3. Try one more time after clearing your browser, website, and CDN caches if you have any. You may temporarily disable the caching plugin for testing.
This is a general debugging process that all WordPress support teams perform to find 90% of the problems.
Regards
.
