how to flash lava iris selfie 50

Does anyone know how to flash lava iris selfie 50.
The method posted in the xda firmware page does not work as the brcm multidownloader is saying error in xml script on the starting itself
Any help would be appreciated

Oneplus 2 selfie camera app

Greetings to all xda members. I am using my g4 as my daily driver and one thing I like over the op2 is the camera app. I would like to know if there is a ported app from g4 or g3 that uses screen as flash for selfshots. I tried 3F by elesbb but it's not working like the LG's. Any help? Thanks in advance!!!