can't get the values to be saved in db

Hello,
I can't get the values of country and city (in my code ion species and energy) saved to the data base. I get the error that the fields are required even if i do a selection. I tryed the last bit in the tutorial but it does not solve my problem.
Hope someone can help.
my github project is:
https://github.com/JeroenSchwab/Beamtime.git

tanx in advance
