The error on "line 37" generally points to a runtime error or a path not found issue.

If you are an iOS enthusiast who enjoys sideloading apps (like ++ apps, emulators, or custom IPA files), you have likely encountered the dreaded Cydia Impactor Error: "Line 37" . This error has become a rite of passage for sideloaders, often appearing at the worst possible moment—right when you think your app is about to install.

Understanding this error is the first step to fixing it. Below, we break down exactly what "line 37" means, why it happens, and the most reliable solutions.

If the app-specific password didn't work, Cydia Impactor might be choking because you have too many expired certificates on your account (max is typically 3).

Since line 37 involves teams.count != 1, you need to clear the slate.

Step 1: In Cydia Impactor, go to the top menu bar. Step 2: Click Xcode > Revoke Certificates. Step 3: Enter your Apple ID and App-Specific Password (or real password if 2FA is off). Step 4: Let Cydia Impactor revoke all active signing certificates.

Once revoked, try sideloading again. Your team count effectively returns to zero, allowing the script to create a fresh certificate.