App store apps won't open.

I am having an issue to where all my app store apps will not open. This started this morning. I have turned the phone off and one several times and still no luck. It is jailbroken. I am only having the issues with the app store apps. Native and cydia apps are fine. I am running 3.0 (7a341) for my os. Any ideas??? Sorry if this has been asked before but I am at work and don't have the time for a search. Thanks in advance.

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