Here is the step-by-step repair guide. Perform these actions in order.

Note: While this is less secure, it often "fixes" the "Unable to connect" error on legacy devices. 2. Update the Search Engine String

This error is a relic of the transition from legacy mobile browsers (like Opera Mini) to modern HTTPS standards. For millions of users in regions with older smartphones, 2G/3G networks, or data-saving needs, Opera Mini remains a vital tool. However, a broken "middleware" handshake between Google, Opera Mini’s compression servers, and your device causes this glitch.

Look for "Opera Mini 7.5.4" or "Opera Mini 12" APKs. These are often considered the most stable "classic" versions.

in Opera Mini, then restart the browser.