Problem with running an example from the documentation

Good afternoon, dear sentinelhub employees!
I have a problem with running the example from the documentation How To: Land-Use-Land-Cover Prediction for Slovenia — eo-learn 1.5.6 documentation
This is not the first time I’ve tried to run this code, but every time I get this error

I changed the workers from 4 to 1, because I was getting this
BrokenProcessPool: A process in the process pool was terminated abruptly while the future was running or pending.

I also reduced the date to make the data load faster, so that it was [“2019-01-01”, “2019-12-31”] and became [“2019-01-01”, “2019-04-30”].

I also tried to increase and decrease the time_difference, but it’s useless

Please tell me how to fix this error

The full code is available in the repository error_sentilenhub_example/main.ipynb at main · volodymyr-sydorook/error_sentilenhub_example (github.com)

Also, if you don’t mind, I would like to ask a few questions that interest me.
I need to develop a program that will allow me to detect changes in land use, find fallow land, fields in use, and so on.
Could you provide more detailed information about this?

Thank you for your attention
I would appreciate a reply