What does this mean?

I lost all the visual icons/commands from Rhino, T-Splines and Thea render. Now I got Rhino back with ‘default setings’ but not the others - even the plugins are still in the program (the object in Rhino is still in ‘T-Splines mode’).

Everytime I open Rhino I get the messages below.
What do they mean?

Error reading file: "C:\Users\Johnny\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\Thea for Rhino (e78da4e8-ce4b-4793-b5e0-334eef444806)\settings\TheaForRhino.rui"
Root element is missing.
Error reading file: "C:\Users\Johnny\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\T-Splines (fd3c34a2-64e4-4124-9c48-d3de98657a35)\settings\TSplines.rui"
Root element is missing.

It means those files are corrupted, I have seen those errors before.
Close Rhino, then try removing the two files that the error message gives, then start rhino again.

Hey, it worked!!
Super thanks, Menno!