The 'Service invoked too many times' error is triggered when a Google Service cannot be used because the user hit his daily quota. This article explains further this issue.
Why do I get this error?
Form Publisher uses Apps Script services to run, and it imposes daily quotas and rigid 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-on, 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 that, try again as soon as your quota resets because we have no control over them.