ERR_UNKNOWN_URL_SCHEME Error: What It Means and How to Fix It

The ERR_UNKNOWN_URL_SCHEME error occurs when the browser cannot recognize or process the specified URL protocol. This can happen if the address uses an unfamiliar or non-standard scheme, such as intent:// or mailto:, instead of the commonly used protocols http:// or https://.

Causes of the ERR_UNKNOWN_URL_SCHEME Error

• Incorrect URL or missing standard protocol like http/https.
• Using app-specific schemes that the browser doesn’t support.
• Required server settings or site code adjustments to handle non-standard protocols.

How to Fix ERR_UNKNOWN_URL_SCHEME

1. Check the URL: Ensure that the URL begins with http:// or https://. Try replacing any non-standard scheme with one of these.
2. Implement protocol support in the code: If necessary, add handling for specific schemes like intent:// (for Android) through custom functions or settings.
3. Set up redirects: Some schemes may require redirects to a correct URL. This can be done on the server side or using JavaScript.