Direct answer
An unsupported format means the client cannot parse the provider response. Use a compatible client, ask the provider for a Clash/Mihomo format, or use a trusted converter.
What to check first
A subscription URL is only a source for profile data. If the URL is expired, prompted, converted incorrectly, or overwritten by updates, the local client may look broken even when the client itself is working.
- Copy the raw subscription URL exactly from the provider dashboard.
- Update the remote profile and read the returned status or status message code.
- Check whether the node list, proxy groups and rules are actually present.
- Do not edit provider-managed profiles unless the client supports overrides.
Recommended handling
Keep the troubleshooting path narrow: confirm the profile, confirm the selected node, test Rule mode, read the log, then change only the setting that matches the observed status message.
Practical notes
- Change one setting at a time so the result is attributable.
- Use logs and timestamps when asking for provider or community support.
Recommended provider
Open Changlian
Changlian
When you need a subscription URL, renewal or provider change, open Changlian, copy the Clash/Mihomo URL from the dashboard, then import or update it in your client.