It was indeed a problem with the loan. Your coollection file doesn't contain the name of the person nor the date of the loan. Normally it's impossible, the interface forces you to select a name. Do you remember what name you entered or how you managed to not select a name?
With the next version, I will modify the app to avoid it to crash when this case happens, but it would be much better if I could understand (and fix) how this case managed to happen. For that I need you to tell me how you did it.
Meanwhile, I have un-loaned the movie, please find attached your fixed coollection file:
Attachment:
MyCoollection.cool [24.89 KiB]
Downloaded 476 times
I suppose that you know how to restore it:
https://www.coollector.com/help.html#coollectionBy the way, when your coollection file gets corrupted, you can restore your latest automatic backup:
https://www.coollector.com/help.html#backupsBut I'm glad you reported this bug, I hope we'll be able to determine how it happened.