Research GUI fails to load if player has non-existent research

[54M44R]

The research GUI will fail to load and throw an error for every research instance in the console if the player has a non-existent research

This can happen when updating to a newer version of an addon. The newer version may have changed or outright removed the keys for researches

Additionally, the error message presented in the GUI is misleading:

I believe that it is best to either:

1. Ignore non-existent research. Its highly unlikely for any issues to occur if a player has non-existent research
2. Remove non-existent research