Thanks, that worked.
Firefox seems to have something that throws up a dialog asking if you want to "resend" or "cancel" a while after you have pressed "Start" to start the array. Choosing "resend" caused everything to go back to the initial unmountable message state. Another reboot, login, start + "cancel" resulted in a much nicer state.
Hi
I have the exact same symptoms as OP + being in maintenance mode and 2% into a parity sync (or Data-Rebuild) since I just replaced my second parity drive. Estimated time left is 2 days and 8 hours. Is a reboot the correct way for me as well?
barbie-diagnostics-20230619-1855.zip