Happens whenever I do /spark profiler, which doesn't work: https://paste.srnyx.xyz/asasegihep.properties

Try updating spark to a newer version.

spark is already on version 1.6.1 (the current latest release on Spigot)

Also, read the info here: spark.lucko.me/docs/misc/Using-async-profiler

Alright, I'll try those things out

I've just pushed a new build to Spigot - in future you can always find the most up-to-date versions on the spark website: https://spark.lucko.me/download

Try updating spark to a newer version.

Also, read the info here: https://spark.lucko.me/docs/misc/Using-async-profiler