We would have to see your code to know. Generally it means that you are calling something that doesn’t exist. If it was working, I would power cycle your device as a first step.
do a Find for “VBDBGDGB” in your code. This has happened to me… accidentally type something into the code editor and forget about it. somehow it gets saved and eventually it gets run.
I often leave the letter ‘c’ in my code for some reason… happened many times.