non productive day at work

Today I couldn't work on my App. I spend the hole day on bug fixing at work and try to find out why the microservice didn't send data via grpC to another client. Actually I have not the best debugging skills yet. So I have to run multiple times the code and compare the data objects if there is anything as it should. Shortly before I want to go home and quite searching for the day I found at least in wich method the parameter is empty. This day feels not very good, because everything I planned did not happen and I couldnt finde the error. Hopefully tomorrow everything get together and I can continue developing my app.