Under "ISP Manager" I get an error when I click on the Recycle Bin. The error is: "The recycle bin cannot be accessed because the system is currently being updated. Please try again in a few minutes." This is ISPConfig 2.2.6
This message shows you, that there where some items currently processed by the system. Wait a few minutes and you can access the recycle bin.
The behaviour is nescessary to avoid data corruption, we will see if we can implement it less strict in the next release.
Yes, i think it is necessary, because also on my servers this message appears for long periods. I'll hope it is solved in the next release indeed.