I was unable to mount a share so I went to the GUI to check up on it. I do not know what version I am running but think it was whatever the latest was a month ago as that was the uptime before shutting it down. Stupid me didn't take a screenshot of it but I did copy the error:

 

Fatal error: Uncaught LogicException: Can't seek file /boot/config/parity-checks.log to negative line -1 in /usr/local/emhttp/plugins/dynamix/include/Helpers.php:204 Stack trace: #0 /usr/local/emhttp/plugins/dynamix/include/Helpers.php(204): SplFileObject->seek(-1) #1 /usr/local/emhttp/plugins/dynamix/include/Helpers.php(214): tail(Object(SplFileObject)) #2 /usr/local/emhttp/plugins/dynamix/include/DefaultPageLayout.php(693) : eval()'d code(429): last_parity_log() #3 /usr/local/emhttp/plugins/dynamix/include/DefaultPageLayout.php(693): eval() #4 /usr/local/emhttp/plugins/dynamix/template.php(82): require_once('/usr/local/emht...') #5 {main} thrown in /usr/local/emhttp/plugins/dynamix/include/Helpers.php on line 204

 

Something on the GUI made me think it was the boot USB drive failing, it is kinda old. I've ordered a SLC industrial drive to replace it in case that's the issue. Was that the right move? I was able to mount the boot drive onto my Linux laptop and copy the contents of it and even image it. I haven't attempted to boot it since shutting it down a couple days ago.

Try booting again and post the diagnostics if you still have issues.