Question-and-Answer Resource for the Building Energy Modeling Community
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Looking at the workflow.osw, "seed_file" : "../000 - \u039e\u0395\u039d\u039f\u0394\u039f\u03a7\u0395\u0399\u039f.osm",, seems like your actual filename is in Greek (in the Drive link it's called 'OpenStudio.osm') . This is recipe for disaster.
Do yourself a favor and restrict naming of your simulation files to the ASCII character set. I'll even go further and say that generally speaking you should also avoid putting spaces in your folder/file names.
Hopefully your USERNAME (C:\Users\USERNAME) isn't also in greek (and doesn't contain spaces).
So in your specific case, call it 000-HOTEL.osm and not 000 - ΞΕΝΟΔΟΧΕΙΟ.osm
In fact, I can run the model named OpenStudio.osm just fine without any modifications if I just open it up in the OS App and assign the EPW. (I cannot test the issue by naming it ΞΕΝΟΔΟΧΕΙΟ as macOS does not accept these special chars)
