issue :net::ERR_UNKNOWN_URL_SCHEME when Connecting Mobile Wallet (MetaMask) to MiniApp

[harissatti]

Description:
I’m experiencing an issue when attempting to connect my mobile MetaMask wallet to a telegram mini app via WalletConnect. When the connection process tries to open the MetaMask app , the following error occurs:

The webpage at metamask://wc?uri=wc%3Ad27be7159428df8702c1faf6a4d2b30a2a6507183975a8789c65100099c509c3%402%3FexpiryTimestamp%3D1729753726%26relay-protocol%3Dirn%26symKey%3Da5f78ea24de419b9ea31078683275bdf2136a24f63c30d5478f7e4e9c8757cdf could not be loaded because: net::ERR_UNKNOWN_URL_SCHEME

Steps to Reproduce:
Open the mini-app (dApp) in a telegram.
Attempt to connect MetaMask via WalletConnect.
The connection redirects to a metamask:// URL, but fails with the error net::ERR_UNKNOWN_URL_SCHEME.

Expected Behavior:
The mobile browser should recognize., open the MetaMask app, and complete the WalletConnect process.

Actual Behavior:
The browser does not recognize

and throws the net::ERR_UNKNOWN_URL_SCHEME error, preventing the wallet connection.

Additional Info:
MetaMask mobile app is installed.
Tested on Chrome and Safari browsers.
This issue may be related to how custom URL schemes are handled by the mobile browser.