Workaround for DavFS2 users on EcryptFS
1.check for existence of ~/.davfs2/ folder. If this exists you are likely using a per user config and cache, rather than a global one. Your cached files will not support long file names.
2. create a cache dir outside of the ecryptfs home. eg /home/davcache. On Mint, this folder must be a member of the group “davfs2”
3. edit ~/.davfs2/davfs2.conf and add the line : cache_dir /home/davcache/
Please note , while cryptomator files are already encrypted before they land in the cache, this is a lot less secure for other files, as they are cached outside of your homedir.