When setting up a Remote Mount, a warning message saying A conflicting <type> behavior exists at /path/to/folder/ indicates that you are attempting to set up the mount on a prohibited folder.

Check that the folder is empty. Only empty folders can be configured for a mount.

Check that the folder isn't within a Remote Sync folder. Remote Mount cannot be used in conjunction with a mount. Alternatively, see if Automations, which can be used with Remote Mount folders, are a better fit for your move or copy needs.

Check that the folder isn't already configured with an incompatible folder setting, such as GPG or File Expiration. If so, disable GPG or File Expiration for the folder prior to configuring the mount. GPG and File Expiration cannot be used within a mount.

A mount is mutually exclusive with a folder's geographic Storage Region setting. A folder can be configured with either a Remote Mount or a Storage Region, but not both. When a mount is configured for a folder, it overrides the Storage Region setting of that folder.