: Since this is a third-party mod, you must allow your Android device to install apps from "Unknown Sources" in the Security settings. PC/Mac Usage
Beware of third-party websites offering "cracked" versions or fake installers. These often contain malware. Always use official PTC channels.
Introduction of non-canonical characters, such as "Sonic" collaborations or fan-designed "OP" (Overpowered) units like the "Cat Cyclone Unit".
Antivirus or firewall blocking the transfer. Fix: Temporarily disable real-time scanning (re-enable after download). Use a wired internet connection instead of Wi-Fi.
