CDO

Hello,
recently, my former colleague, a climate scientist, left the company, and I am now learning to maintain her code to run our service. However, I encountered an error that I cannot trace back to the source and that is preventing the code to produce results.

It is prompting me to use CDO -L somewhere, but I have no clue where. Moreover, is there any chance that the ERA5 recent change in the CDS has changed the formatting of the data?

I am looking for someone to work on solving these issues together. Solved this issue, I envision a collaboration on maintaining the current code or replicate it in a different language.