Need help with Groups Plugin

I have 2 helpers on Twitter and they cannot find out the problem on my Group Plugin (one of them coded this plugin himself)
Pastebin: https://pastebin.com/rd1Yw9Z4

The error is (I think it is the error):
[Server thread/CRITICAL]: ClassNotFoundException: "Class Adversarius\RefreshTask not found" (EXCEPTION) in "/src/spl/BaseClassLoader" at line 144

 

The plugin needs a use statement for the class named "RefreshTask".

 

facepalm section?

 

I don't know anything about PHP – please give me the working code, then...

 

STOP STOP STOP noone is giving you a code we say how to solve it but no code.
(German: Also du fauler Sack, entweder du folgst den Anweisungen, welche dir zur Lösung verhelfen oder du lässt es deine Plugins weiterzuschreiben. Ich bezweifle, dass du das geschrieben hast, denn sonst wärst du kompetent genug das zu fixen)
Here you can found a fix http://lmgtfy.com/?q=How+to+fix+a+ClassNotFoundException+in+PHP

 

Reported. Reason: unfriendly

Plus, I didn't make that plugin. The friend of my helper did, and they both don't have an idea how to fix the problem. I gave my helper a screenshot of the error too, but it didn't help.
Maybe they are only Beginner-Amateur coders.

 

I searched in Google too, but it didn't really help me, I think. Sorry, but I never learned PHP. And if even my helper(s) cannot fix it, I have no idea.

This is the only thing I know: I cannot a file named RefreshTask on my server.

 

We can't solve this issue for you. We don't know if RefreshTask is a class anywhere in your plugin's folder, or what it's purpose should be. Use statements and using other classes are some of the simpler things in plugin development. If the class doesn't exist, you can delete the line that starts the task, but chances are it will have side effects.

 

Ret#rd!

If one of them coded that plugin, how he doesn't know how to fix it?

 

I have no idea. I showed the error to one of them but they still don't know what to do.

 

Just use pureperms and purechat.

 

I have no idea, my helpers say that PureChat and PurePerms aren't working and very glitchy sometimes.

 

If you use the latest pureperms and purechat from github. It works fine.

 

OK, I installed PurePerms and PureChat again on my server, but the perms doesn't work at all. The "list" of perms in groups.yml don't load – not a single one. The PurePerms plugin is loaded, but perms don't work.

 

Picture?

 

It says "You don't have permission to warp/use this warp".
I added essentials.warps.*

 

What does this have to do with ranks?

 

What's exactly the RefreshTask ? A class ? A file on your plugin ? A file on the software ?

 

I don't know. I never had or saw a file named RefreshTask. But maybe I can look at it again.

 

Setting perms to ranks/groups.
Plus, here is a screnshot of groups.yml:
http://i.cubeupload.com/0MJTC7.jpeg