Solution
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The user is not logged in to the device.
When attempting to access the Remote File Browser without first logging in, the user will see the following error: An error has occurred. Please check that you are logged in, have file system permissions, and that the WebDAV server module is installed.
First verify that you have logged in to your device.
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The user doesn't have authorization to access the device.
If you open a session with the user name Admin and leave the password blank you cannot view the Remote File Browser. Admin with a blank password is the default username and password. You will need to create a non-blank password and login to the device.
The user will see the following error otherwise: The Remote File Browser requires users to have a non-blank password. Please change your password on the Security Configuration Page.
Log in to the real-time target using either the default username and password or the specified user-configured login and navigate to the Security Configuration Page.
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The WebDAV server module is not installed.
WebDAV support is enabled by default on NI Linux Real-Time targets. For non-Linux Real-Time targets,you may refer to this Using WebDAV to Transfer Files to Your Real-Time Target
After opening a session, you can add a directory to your cRIO: