If you are using a free Apple ID, Saurik's built-in server-signing mechanism may remain permanently broken due to Apple's modern security protocols. Fortunately, the iOS development and jailbreak communities have built powerful, modern alternatives that handle sideloading flawlessly without requiring a paid developer account. Modern Alternatives to Cydia Impactor
Since Cydia Impactor is no longer maintained (last update: August 2019), users must switch to actively supported alternatives: assert code 200 cydia impactor
: A popular Windows and macOS alternative that handles modern 2FA more gracefully. If you are using a free Apple ID,
Click on the menu at the top of the application window. Click on Revoke Certificates . assert code 200 cydia impactor