I am also receiving an error. I had not before and was able to pull data and then it would not update. After several months of not using it I thought I would start from scratch. I disconnected twitter and then started again. Here is the error message I received:
Error
Request failed for https://api.twitter.com/1.1/search/tweets.json?q=heritage&count=100&result_type=recent&include_entities=1 returned code 401. Truncated server response: {“errors”:[{“code”:89,”message”:”Invalid or expired token.”}]} (use muteHttpExceptions option to examine full response)