My ecommerce website'scontrol panel url has suddenly stopped functioning. I am able to access the url only intermittently (https://www.example.com/custom-admin-url/), and when I do see the login page and after entering the credentials, I get a 500 timeout error after a very longish wait.
I tried changing the PHP parameters, max_execution_time and max_input_time, to 14400 (seconds). Still, the problem persists.
The main website is working just fine. I am unable to find anything worthwhile to fix this. Any pointers in the right direction would be very helpful.