I have a stack of 4 HP1950s, two JG962A and two JG963A working together in an IRF stack. All of a sudden the management interface is broken. I can login but after that the menu remains empty only an error window opens with "The data error". (see here)
Looking at all the web requests I see a request to "/wnm/get.j?sessionid=abc" which gets answers with
"rpc-error":
{"/rpc-reply":and then everythings ends.
I'm quite stuck with this since these things are completely useless without a web interface since CLI is abcent. The only thing I tried so far is cycling the power. Network switching is performing without any issues. From what I can tell these all seem to run firmware version r3115p03.
I'm in the blind here. I'm looking for insights on how to analyze this and what steps to take to get this back to life.
Any insight/advice is apreciated