I recently upgraded Ubuntu to 22.04, and installed PuTTY 0.76 in it.
Sorry, I can't remember if I used apt install or a snap.
Putty initiates OK, but when attempting a terminal session with an open, nothing happens.
Apparently Putty just terminates.
But I discovered that if I run Putty with sudo in a terminal session, it behaves properly.
As well, a simple SSH terminal without sudo is able to initiate a terminal session in the object machines.
I have been using Putty 0.76 in older versions of Ubuntu satisfactorily up to now.