When I try to create a warp sign, using warps that exist, it never works... Here is the format:
[Warp]
Bacon

can you paste your server log when you try to create this with debug mode enabled in essx.

In the essentials config remove the # infront of ' #- warp ' it's in the enabledSigns section

Closing due to inactivity; if this is still a problem, feel free to open a new issue.