Same error with davfs, but *cifs* work! <mkmountpoint enable="1" remove="true" />
<volume fstype="cifs" server="server" path="files" mountpoint="/mnt/fileserver" options="nosuid,nodev"> <not><or><user>root</user><uid>0-999</uid></or> </not> </volume> <volume fstype="davfs" path="https://server2/webdav" mountpoint="/mnt/webdav" options="username=%(USER),nosuid,nodev,uid=%(USER)"> <not><or><user>root</user><uid>0-999</uid></or> </not> </volume> </pam_mount> Please fix this issue in pam_mount.