OCR engine does not return result

Hello friends, how are you?
friends, i need your help … i was using CV normally, but i don’t know why now when i use any activity that includes CV, the message appears: “The OCR engine did not return any results. There may be a problem with the configuration” . Can anyone tell me why?
Thank you!

i met the similar problem,please tell me the solution if you get a answer, thanks in advance.