I posted an update to my site last April with no issues.
I went to post another update to my site the other day and I can’t get into the backend. When I go to /system, I see:
Exception Caught Unknown model: ee:Config DataStore.php:556
I’m not sure why I’m getting this error or how to fix it. Any suggestions?
I suggest you try some of the troubleshooting practices: https://docs.expressionengine.com/latest/troubleshooting/general.html#blank-pages
My suspect is that some of the files did not get updated/replaced properly, so you may try re-uploading everything (make sure you keep backup of your config file!)
Also as of EE5/6 it is recommended to use /admin.php as entry point to the control panel instead of /system directly