Yesterday, I opened the link https://meta.discourse.org from an old message of mine on Instagram, and when I tried to log in, I couldn’t. The only solution was to open the browser and log in the usual way. Is there a solution to this problem? Attached is a screenshot.
The error is disallowed useragent; here is Google page describing the error.
Essentially, Google is preventing this since third-party applications can track your activity or steal your authentication credentials when you open links in them.
To prevent this, open links from the full browser rather than within the app.