Evernote on iPhone quits after a few seconds

[David GS 0]

Evernote on my iPhone has long been fine, but now starts up then quits after a few seconds.  Message says it has "encountered an unexpected error and has to quit". The message also asked "Would you like to send a report so we can fix the problem?" I chose yes "send report", then later "always send".  Problem persists. I have basic Evernote on two devices (iPhone and Mac) and never had this problem before. It still works fine on my Mac but quits on iPhone. So to check, I tried putting Evernote on a third device, my iPad.  After opening it said I could only use basic on two devices, so I then removed the iPad as a device.  But still Evernote quits on iPhone after a few seconds.  Anyone please help? Why should this problem suddenly arise?  I have an iPhone 6S Plus running IOS 11.2.1. Thanks!  David 

[TK0047 422]

I wouldn't know what the reason would be, however, have you removed and reinstalled the app on your iPhone to see whether that would solve it?