@apleisacol, select Opera > About Opera, or go to opera:about, make a note of the path to your profile, close the Opera. Navigate to the profile folder, and open the Preferences file in your text editor, search for "excluded_schemes" (under "protocol_handler"), or "magnet":, and change "true" to "false: as follows "magnet": false, (if it does not exist, add it), save the changes, and close the file, relaunch the Opera, and see if this helps 😉
Slight notice: the default path to the profile should be as follows:
~/Library/Application Support/com.operasoftware.Opera
The ~/Library folder is hidden by default in the Finder. You can enable it as follows:
defaults write com.apple.finder AppleShowAllFiles -boolean true; killall Finder.