HeadHunter?

[Shroomy]

When I do /sellhead it says this: https://gyazo.com/2f24f62b0886431dca13ef4be1f2a0d5

If you could please tell me how to fix: https://gyazo.com/84aa19bc312ff982834e6dc0e325003d

 

[Shroomy]

Another plugin may be interfering with HeadHunter, You should check errors in logs.

21.03 22:37:31 [Server] ERROR null

 

[Nagi]

Full Stacktrace Please

 

[Shroomy]

Full Stacktrace Please

I don't know what you quite mean by that.