All - iCloud tells me that the password I use for a numbers file stored in iCloud isn't correct. I've never changed this password and it worked 2 weeks ago. Other password-protected Numbers files in the cloud still work fine. Has there been a corruption of the iCloud password database recently? Are there any options on the Apple side to recover this file? It is the most important file I use.
iMac, OS X El Capitan (10.11.5), iPhone 6 plus, iPad mini version 4