Which or jailbreak environment are you using to install the app?
: Necessary to allow the installation of unsigned or modified IPA files. cracktool4 ipa fix
To resolve this, close CrackTool4 entirely, force-kill the app from the app switcher, and toggle Airplane Mode on and off. Alternatively, try switching from cellular data to a high-speed Wi-Fi connection or vice versa. Which or jailbreak environment are you using to
Ensure that custom tweak loading allows the CrackTool4 dylib to inject, or temporarily disable Choicy for that app to test. Alternatives to CrackTool4 close CrackTool4 entirely