Yikes! Today Mobizen updated their main app, stripped the mirroring out, put it in a different app, and changed their main app to be screen recording ONLY. The impact is that the Mobizen you have been using WILL NOT WORK ANYMORE.
To get Mobizen screen control again you need to download their new app, “Mobizen Mirroring” from the Play Store. Here’s the link:
Download this, get it up and running, and use it to get control of your watch. Then, use this new Mobizen Miroring app to navigate through the opening screens on your old Mobizen app (now Mobizen Screen Recorder) to get it configured if you want to use that recording feature on your watch, otherwise back it up with your App Backup and Restore app and uninstall it from your watch to free up space. You won’t need it for controlling your watch.
Just a reminder, when doing the dual authentication six digit number entry on your watch (yes, you have to do it all over again), if your screen is overtaken with your keyboard for data entry, back out of that and place a check mark in the box on the screen so this becomes a trusted link and you don’t have to do the dual authentication process again. Then enter the code and move on. Subtle, but a trip-up point if you’re not aware.