Immediately after the release of iOS 9 jailbreak, Saurik updated Cydia Substrate to work with the latest firmware. And so
Saurik also notes that due to the change,made by Apple, all 32-bit tweaks must be reassembled, otherwise they may not start or cause errors. Developers with 32-bit binaries or extensions published to Cydia should recompile them to prevent problems for users.
Here is the complete list of Cydia changes:
0.9.6010 fixes the 32-bit armv7 slice, which was keeping extensions from loading into Cydia. (Note that, additionally, all 32-bit binaries, in particular extensions, must be recompiled using -WI, -segalign, 4000 for iOS 9 due to a change made by Apple. Extensions that have not been recompiled might “get lucky” and work, but they will usually either fail or even crash.)
If you have not updated Cydia Substrat, we strongly recommend that you go to Cydia and install the update.
If you have not jailbroken and are usingold firmware, then this is the best time to upgrade to iOS 9.0.2 and jailbreak before Apple released iOS 9.1 and stopped signing iOS 9.0.2.