For some reason, I randomly started getting an error when trying to upload files to an extSD card through Airdroid Web.

Client: Airdroid v3.1.5.1
Phone Model: Samsung Galaxy S5
Phone OS: Android 4.4.4
Desktop Browser and OS: Windows 10, Google Chrome 44.0.2403.157
I can verify that I have root access, and that I HAVE successfully modified permissions.xml (using an app, rather than a manual edit), and can verify that permissions.xml contains settings for <group gid="media_rw" />.
This popped up about 4 days ago, with no changes done on my part (except for automatic updates on AirDroid).
Anyone else having this problem?

Client: Airdroid v3.1.5.1
Phone Model: Samsung Galaxy S5
Phone OS: Android 4.4.4
Desktop Browser and OS: Windows 10, Google Chrome 44.0.2403.157
I can verify that I have root access, and that I HAVE successfully modified permissions.xml (using an app, rather than a manual edit), and can verify that permissions.xml contains settings for <group gid="media_rw" />.
This popped up about 4 days ago, with no changes done on my part (except for automatic updates on AirDroid).
Anyone else having this problem?