This issue is related to the similar error message, "The email body is too big. Please adjust the size of the email body".

The fix is to increase the value of the customalertmessagesizetotal and customalertmessagesize fields in the INSTALLATIONINFO table. The default value is generally 10 (KBs). It is suggested that you try an incremental update of the value of 10 KBs at a time. (e.g., update to 20, then 30 if it still errors frequently, then 40, etc.) The scripts to update these can be found below.

update installationinfo
set customalertmessagesize = 20


update installationinfo
set customalertmessagesizetotal = 20