copilot chages and limits

Hi

I have been using copilot since it arrived in Edge and been very happy with it

this week oit started to say it couldn't create what I was asking for, which was only my normal stuff

what ever I asked it said it could not do it

then out of the blue it went back to creating and was better than before

created 2 images and it said I have ran out of image come back later

please what has happen to it

I have never been stopped before