How to fix the "Notifications: not enough space for notification 'Test message from ***'" error?

I am receiving the “Notifications: not enough space for notification” on many of my accounts. How can I fix this error?
I changed my mobile phone and updated the MQID but that did not fix this issue.

You can only send them so fast. IIRC two per second and 10 per minute maximum. Slow down.

I use many EAs, lots of them work end of candle so that behaviour can happen sometimes.

Is there a way to reset that error once it happens?

i also got the same problem