Crashes when trying to create a new spectral index

I have hit a roadblock where the program will crash any time I try to generate a new formula for a spectral index. It happens when either generating a custom formula, or just simply duplicating one of the existing ones such as red, green, or blue. Does anybody know what causes this and how to fix it?

Hi,

Thank you for your question.
Is this happening with a project in particular or only with a specific project?

Could you please upload the log file?

Cheers