Problem installing MQTT Binding

I downloaded the latest openhab2 online from the site (for linux), but it isn’t letting me install the mqtt binding. It just spins

Any ideas on how I can fix this?

Thanks!

Have you tried to wait for 30sec or so and then refresh your browser window? Very few of the extensions seem to automatically update their installed status for me, but a browser refresh shows them as installed after waiting a bit.