Background: Problem seems to have been triggered when a Ubuntu System update (libwebkit-gtk) was installed mid September.
As this was a security update I guess everyone would have installed it.
Best workaround (at least for me):
Problem appears mostly when doing Payments or Receipts
So instead of clicking on any of those two sections, right click on it and select “Open Link in New Window” or if this doesn’t work select “Copy Link Location” and then opening a browser right click in web-page bar and select “Paste and Go” or “Paste” followed by pressing Enter key.
This will run that section separately and appears to be working fine.
Important: Do not mess with original Manager page as you might end up with conflicting entries. I always completely close and re-start Manager after I’ve used that external browser page.
