Have you tried hangouts.google.com in the web browser of your choice? Some seem to "play better" with the Hangouts webpage than others do.
I most commonly use the Chrome App, but I have used the Hangouts webpage, too. Of course, you do have to acquire a Google Voice number (which is available at no cost only in the USA and Canada) in order for Hangouts to act like a typical phone line does.
Brian - Windows 10 Home, 64-Bit, Version 1803, Build 17134
A little kindness from person to person is better than a vast love for all humankind.
~ Richard Dehmel