If the player is offline and you spam the on/off button on the quarry it will produce loot.  Not sure if that will work for an online player.

The owner is offline. If you start quarry, it should close immediately.
Unless his friends or team members or clan members are online

The quarry never starts but still outputs mats.  Nobody was online that was in clan or friend.

I tested it and found no such situation. Could you tell me more about it?

made this so you can see 

https://youtu.be/Hs-3PDqLwIU

Did you use any other plugins to modify quarry?

No I just use old school quarries by biscuit

Merged post

Wait I did have a plug-in made to make quarries indestructible

Try uninstalling them

Merged post

I looked at the OldSchoolQuarries plugin and it doesn't seem compatible

That was the problem when I unloaded old school quarries it still used low grade but no output in the loot box.  Is there any way to change quarry output without a plug-in or 1 that is compatible that you know of?  Thanks for your help by the way.

fixed it, If I have time, I can write a plugin like this.

thank you