I check my Localized files and they are free of errors. I'm using the library https://github.com/d0ping/DBAttachmentPickerController and looks like the source of my problems.
I have the following error:
2017-06-23 15:50:31.056756+0200 MyApp[5116:1989916] No localized string for 'file_infected' in 'DBAttachmentPickerController'
DBAttachmentPickerController belongs to the library that I had installed with cocoapods and 'file_infected' is a string that belongs to my project Localized files.