My GPT 4 is unstable

When I first got the membership GPT 4 was pretty stable for me, but the past few days it's been unstable. I've tried closing and reopening but it doesn't work. Everytime I try to send a message I get an error message. I've tried closing other apps and even closing my previous messages to GPT 4 and nothing seems to work. If I try to send a message it will just say there's an error. Does anyone else have this problem and how did you fix it?