Direct answer
iOS subscription import checks are commonly caused by unsupported URL schemes, copied whitespace, expired subscription links or a provider format the selected iOS client cannot parse.
What to check first
Each platform has its own permission model. Windows focuses on ports and security prompts, macOS on chip architecture and system permissions, Android on VPN/background behavior, and iOS on App Store proxy clients.
- Match the package to the device platform and CPU architecture.
- Grant only the permissions required by the selected feature.
- Compare the tutorial screenshots with the client version you installed.
- Use platform logs or permission panels when the GUI looks normal but traffic has a problem.
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.