Cryptomator Sync over WebDav has one locked file preventing complete sync

I am using nextcloud desktop on macos with cryptomator for macos installed locally. IT’s been working pretty well for a few days, but lately, I get the red ‘X’ on the menubar telling me one of the files are locked. Has anyone else experienced this and and knows of a workaround? I have no idea what the locked file is in relationship to my original data, which there are several gigs of. Using Sierra

This turned out to be a server side webdav hosting issue and nothing to do with Cryptomator or it’s webdav hosting implementation.