Seeing this error message on the form submission page for Microsoft Sharepoint List Business account Destination.
Error: System Error: There was an error that caused your request to not be completed properly. Please try again, and contact Support if the problem persists.
The common reason for this error is that a specific text value is greater than 256 characters, and this error message is coming from Sharepoint. One of the data types in Sharepoint reached the maximum character limit which causes this problem. In order to resolve this issue, check the Sharepoint settings and fix the specific data type where the character limit was exceeded, and re-execute the failed destination on the portal.