Can't install extensions in Safari
I can't install any extensions in Safari- After clicking on the Get button which leads to the Install button, I see the Get button reappearing and I don't see the extension appearing in Safari's Preferences/ Extensions to approve of.
I'm using MacOS Catalina 10.15.1 and Safari 3.0.3 (15608.3.10.1.4), Macbook Pro 13 early 2015
MacBook Pro 13", macOS 10.15