Hi, I recently changed my monitor, turned it on and tested it, and it went very well.
I turned off my computer, but when I turned it back on I ran into a problem, the taskbar was not there, the classic Gnome environment was activated, I checked Zorin appearances and it was activated, but then I went to the extensions and I saw this error:
Any hardware change to the system may require the desktop to be reloaded. While many things are hot swappable, it's not always perfect. This happens automatically in windows, so you wouldn't notice (why they give you the faded screen and ask if you want to revert your settings. The DE was restarted, but you blinked and missed it). Most hardware changes require a reboot. A monitor, keyboard, mouse, BT speaker, headset and such don't, but may require restarting the service that uses it for it to work properly (not always). So Aravisian's solution should work for you. Changing the desktop layout may do the same. Logging out and back in as well.
Yes, it's a customization issue but on Zorin Forum, under Customization, the description tells it's a category to share your custom wallpapers, themes, and icons for Zorin OS, while you were asking for help about it instead. Don't worry though, users with level 3 or above and moderators here can move posts to the correct category to keep the forum tidy.