Common causes include an expired link, an invalid token, network access failure, TLS validation failure, an unsupported response format, or server-side rate limiting. Copy the complete URL again from the provider console and update it through the client's remote-subscription interface. If the status code does not change, ask the provider to verify the account and endpoint.
What do 401, 403, 404, and parsing errors mean?
Find the HTTP status or first parsing error for this update in the logs. 401/403 points to authentication, 404 points to the address, and an HTML response means the content is not a configuration.
- Is the link complete, including its token or authentication parameters?(See Secret and token security)
- Does opening the link in a browser return 401, 403, 404, or blank content?
- Do the client logs show timeout, TLS, YAML, or parse errors?
- Is the subscription response a configuration format supported by Clash/Mihomo?
Reimport the subscription based on the response
- Copy the complete subscription link without extra spaces or line breaks
- Use the client's subscription-import interface; do not import it as a local YAML file(See Configuration Basics)
- Use the HTTP status to distinguish authentication, expiration, and server-side problems
- If the response reports a YAML parsing error, send the line number to the configuration provider
Subscription URLs usually contain a private token and should be treated like passwords
Do not post the complete subscription URL in a public forum, support-ticket screenshot, or GitHub issue
A failed update does not necessarily mean the client is broken