Type of bug

Other unexpected behaviour

/ess dump all output

https://essentialsx.net/dump.html?id=2fbe46c34ee04580834c7716b0c028e2

Error log (if applicable)

https://paste.gg/p/anonymous/65e77e1b66e841b28379775abe28ac54

Bug description

When Discord responds with a 5XX error code, EssentialsDiscord's webhook fails and doesn't attempt to send it again. 5XX errors are server errors, so they should be treated almost like a 429 and re-attempted after some delay.

I also tried /ess reload after this happened, but console messages still wouldn't send in my chat (I had to restart the spigot server).

Steps to reproduce

The trigger happens outside of the plugin environment, so you can't reproduce unless you're on a build thats calling to a proxy endpoint rather than a discord endpoint and manually responding with a 5xx

Expected behaviour

EssentialsDiscord should reattempt the webhook message

Actual behaviour

EssentialsDiscord stops trying to send webhook messages, even after /ess reload