Cydia Impactor Error Line 37 -
Line 37 in the Cydia Impactor source code points to a failure in the XML parsing or HTTP response from Apple’s web services. Historically, this occurs because:
In plain English: Apple changed the locks, and Cydia Impactor lost its keys.
When you run Cydia Impactor and drag an IPA file onto your device, the tool communicates with Apple’s servers to generate a provisioning profile. The error "line 37" usually appears in the "Progress" window alongside text similar to:
progress.hpp:37 Please sign in with an app-specific password
Or sometimes simply:
cpp:37 You must use an app-specific password. cydia impactor error line 37
In older versions of the error, it referenced https://development.xp.apple.com failing to respond.
If your Apple ID ends with @company.com and is managed by your employer, you cannot use it with Cydia Impactor. Managed IDs have restrictions that cause the team.count assertion to fail.
Let’s be realistic: Cydia Impactor is deprecated. The "line 37" error will keep returning every time Apple changes a server. The modern jailbreak community has moved on.
If you cannot fix the error, use these alternatives:
AltStore / AltServer
Sideloadly (by iOSGods)
Xcode (For Developers)
Navigate to Security:
Generate a Password:
Use the Password in Impactor:
Result: If this was the sole cause of line 37, Impactor will bypass the error and begin signing.
While this article provides fixes, it is important to state the truth: Cydia Impactor is dead.
The developer, Jay Freeman (saurik), has not updated the tool to support iOS 14+ or the latest Apple security protocols. If you are trying to jailbreak an iPhone running iOS 15, 16, or 17, Cydia Impactor will not work.
The most effective solution is to stop using the original Cydia Impactor. The developer has not updated it since 2019. Instead, use AltStore, Sideloadly, or SideStore.
Once you switch to Sideloadly, you will never see line 37 again. Line 37 in the Cydia Impactor source code
In 99% of cases, the Cydia Impactor error line 37 is caused by Apple’s security layers, specifically Two-Factor Authentication (2FA) or Two-Step Verification.
Most modern Apple IDs require 2FA. When Cydia Impactor tries to log in using your password, Apple says, "Nice try, but you need to provide a verification code." Because Cydia Impactor hasn't been updated in years, it crashes during this handshake, throwing error line 37.