Channel Sources app
I've been trying use the Channel Sources app to set up this channel as a place to relay content from my Mastodon account. I've installed the Channel Sources app, but when I open the app, click on the "New Source" link, add the name of the channel for my Mastodon account, and click the Submit button, the next screen doesn't load. The URL bar changes to "https://hub.netzgemeinde.eu/sources", but the browser screen is completely blank.
When I return to the main page for my Hubzilla instance and navigate to the Channel Sources app again, nothing seems to have changed (my assumption was that I would see a list of sources).
It was suggested to me that I uninstall the app and reinstall it, but I can't figure out how to do that: as far as I can see, my apps installation page seems to have "update" buttons but not "uninstall" buttons. (I'm extremely new to Hubzilla, so I'm not sure if I might be looking in the wrong place.)
Is there something wrong with the Channel Sources app, or am I doing something wrong?
Thanks in advance!