For me, Roboform continued to work on regular Opera, but not on Opera GX nor Opera Beta.
I managed to fix the issue using this workaround:
- Uninstall the extension from your Opera browser
- Right click on the Roboform icon in the task tray by the clock
- Select "Options"
- Click on the "Browsers" tab
- Click the "Install" link by "Chromium-based browsers"
- This will instantiate a window saying "Open your browser .... and drag this icon there"
- Left click & hold on the little square page icon to the left of the word "Chromium"
- Drag the icon onto your browser web page
- A window will appear asking you to confirm - follow the prompts
- Running Windows 10, latest version - YMMV