Please accept our apology for the trouble.
First please try turning your device off and on and try using Vividi again.
If the problem still persists, go to your profile and click on the Settings icon. Then click on Help center and submit a request with the following information.
1) The trouble you are experiencing with Vividi in detail
2) Check if your phone's basic camera application is working
3) Send the picture downloaded in your camera album after taking a picture from the effects