The 403/404 errors will happen due to a burst of multiple requests from the same IP address. As for the timeouts are they 502 or 505 errors?
They're not really timeouts, rather very long delays. I either get a 403/404 or it works after 10+ seconds. Never seen a 5xx.
Do the errors happen all the time regardless of the time of the day, or do they occur at a certain of the day? I'm not understanding how and why would you get timeouts when the servers is barely at 10% capacity whenever I check.
I'm using the site at various times during the day, though I'm not sure if the errors are during a certain timeframe.
I've checked the logs against the last IP address you used to login into and it seems you are triggering the burst protection, is there anyone else on your network using the website?
No.