Since you continue to experience this error, I recommend that you contact support.
I also recommend that you record a video of the event where you narrate what you are doing that shows the state of your base before pasting and what triggers the error. Include this video in your support request.
There is not enough information for people on this community forum to tell how to paste data without getting the error.
I have been emailing support about this for months.
Happens to me in every base, across multiple accounts, different subscription plans, various browsers, multiple machines and operating systems.
I have not been able to pinpoint an action that consistently causes it either. Sometimes I get it when pasting, sometimes when creating a new table or field. Sometimes when saving a formula (that is never fun)