Service invoked too many times error are triggered when a Google Service cannot be used because the user it his daily quota. This article explains further this issue.
Why do I get this error?
Form Publisher use Apps Script services to run and it impose daily quotas and hard limitations on some features. If you exceed a quota or limitation, the add-on will no longer be usable by the current user.
Apps Script quotas are shared with every other Scripts and add-ons, so even if it's the first time you use Form Publisher this day, it's possible that you still already have burnt your quota. (List of quotas)
What should I do?
To solve this issue, try again as soon as your quota is reset as we have no control over those quota.