I recently upgraded our cluster from Qlustar 13 to 14.  Since yesterday I noticed strange behaviors in Qluman GUI:
1. When using Hardware or GPU wizards, no nodes are shown in the "selected" list, even though I selected one in the "Enclosure view" window.
2. On the "Slurm Config" window, when creating a new "Gres group", I select a Type of GPU, but when pressing enter or tab, it is cleared.

3. Today, the "Enclosure view" is completely blank.

 
Since I noticed these problems yesterday, I have avoided writing changes to files.

What could be causing this?