Some users have reported encountering this error when attempting to run AutoSSL for one of, or all of, their cPanel accounts.
8:29:43 AM The provider "cPanel (powered by Sectigo)"
cannot currently accept incoming requests. The system will try again later.
After a significant number of SSL requests from cPanel customers have been submitted to the AutoSSL provider Sectigo, additional requests will be rate-limited. When the rate-limit is in place this message will appear when attempting to run AutoSSL.
There is no immediate solution to this other than to wait until the rate limit of Sectigo issued certificates to restore to normal speed.