Sometimes, you may encounter paper thread dumps. It is not an error but it seems like it.
A Paper thread dump generated due to a slowdown caused by ParadiseLand.
The reasons behind this warning could be various, such as:
Not performing hardware, maybe your CPU is not enough to run ParadiseLand
The server is weighted by other plugins that slow down the chunk generation
A real ParadiseLand issue
Make your PC asleep
Many other reasons...
Try to "fix"
This is not a fix but allows the server to perform tasks at a slower pace, reducing the frequency of alert spam.
This is aPaperissue and should not exist in Spigot.
So, open your paper.yml or in the latest versions /config/paper-global.yml configuration file and edit the setting watchdog.early-warning-every property from 5000 to a higher value like 120000.