How to fix popup screen and uninstall ViPER4Android Audio Effects?

My phone just root and install siratus rom.Then installed xpose installer with some modules. After activate module and restart, everything fine. So i install ViPER4+driver and flash ViPER4 theme. After restart it show pop up " Unfortunately ,T-mobile has stopped" . It's so annoy me a lot. How to get rid of that. I tried to find anyway to uninstall ViPER4 but seem unluck. Anybody know how to?:(

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