Service invoked too many times for one day: urlfetch

SyncWith is a Google Sheets add-on and relies on Google services to operate correctly. In order to update your spreadsheets, SyncWith has to call Google's urlfetch service approximately 50 times per day.
In order to promote efficient programming and fair use of shared resources, Google limits how often this function can be called. If your Google account, across all of its spreadsheets, formulas and scripts, calls this function more than 20,000 times per day, you will begin seeing errors in SyncWith.
Most of the time, you do not need to worry about this. However, if you see error messages like:
Service invoked too many times for one day: urlfetch
Then you are exceeding this limit. The only solution is to reduce your usage of this service and wait a day for the quota to reset.
Common culprits that can cause high usage of the urlfetch service are:
  • ImportAPI formula function
  • ImportJSON formula function
  • UrlFetchApp.fetch AppsScript function
Please check your spreadsheets for excessive use of these functions and reduce them where possible.