first time I've seen this, happening on multiple win10 computers
when logging into channel bridge, tab switches to another vrbo screen and then briefly flashes plugin blocked (with the puzzle icon) at the far right side of the address bar (next to the bookmark star in chrome). Then the channel bridge screen just resets, always with the refresh status button showing spinning.
I tried another computer, same thing but after about 20 attempts it worked and the menu buttons for downloading reviews/bookings appeared. I went back to the first computer and found after enough attempts it too did work. So there is a kind of workaround here.
The one common thing I've done on both computers recently is to upgrade to MS office 2016. Not sure that could be related or not.
On the first computer I did a full reboot when the problem first surface, same result.
And I did confirm that channel bridge is enabled as an extension.
We're opening a ticket for you about this issue.
This was caused by an update on VRBO's site and solved in Channel Bridge v 10.15.