You would get that if it was never able to check the keyword... I woud double check your Google API key. If you click on one of your keywords manually, do you get any sort of error?
I only get this error on some of the google searches, bing and yahoo are fine. new here so have not a clue ? Is there a way to reset? thanks for your time..
You might check your Google API console (link under the settings area)... See if maybe you have exceeded the allotment of queries Google allows for your key (they have daily usage stats in there). Since Bing and Yahoo are working normally, it definitely points to something specific to Google... and if some of your keywords are working, my first suspicion is the API key daily quota is being hit possibly.
Error returned from search engine: Daily Limit Exceeded..... You might be correct.. Anyone know how many we are limited too? or how many an upgrade would get?