O.k., seems there has to be a missunderstanding. Please activate debug mode for your App, retry the bridge management till you get the error again and then send a log-file to the support as a reply to their note.
This should help them investigate your issue.
Please also include when/how you noticed that it “stopped connecting to the WLAN”.
Meanwhile you could also try to restart your smartphone or try with another device to rule out an bluetooth issue there.