A. 1. Verify mod compatibility: Check if the mod is compatible with the version of the app or game you are using. Sometimes, mods are designed for specific versions. 2. Read installation instructions: Ensure you are following the correct installation steps for the mod, as improper installation can lead to non-functionality.

B. 3. Look for updates: Some mods may have updates or patches available that fix issues with functionality. Check the source where you downloaded the mod for any updates.