Skript hit an internal error
Applies to Paper, Vanilla.
What it looks like in your log
[Skript] Severe Error:
What causes it
Skript printed its "Severe Error" block: an exception inside Skript or one of its addons while running a script. Skript itself says the addons are the usual cause, and a Skript build that does not match the addons or the server version is the usual reason.
How to fix it
Update Skript and every addon to builds for this server version first, since a mismatch between them is the usual cause. Then remove the addons one at a time, starting with any named in the stack trace.
Not sure this is your problem? Paste your log and Roastd will tell you which of these it actually matched, and what else it found.
Check your own log