[Q] Really weird problem with Redmi 1s - MIUI Camera Vanished topic

I've got a Redmi 1s with stock ROM. (v36.0) 4.3 JLS36C with root. Everything was working fine and I was taking some pictures. All of a sudden Camera shortcut got deleted from the Launcher. I checked the presence of Camera.apk and .odex file at /system/app and is still present there. Tried the following steps, but could not get the Camera launcher back online.

Details:
Rooted stock (version 36.0) CWM installed
Steps tried so far:
Cleared Cache
Cleared Dalvik Cache
Checked the permissions and ownership of the camera.apk.
Tried copying the camera.apk to the sdcard folder and tried installing. It prompted with a warning that the installed app will replace a system app, and on clicking install, the installation failed with an error message "installation failed"
Nothing worked.

Links2SD is installed and none of the apps are frozen.
Tried activity launcher to see if there any camera activity that can be launched, but again in vain.

Please help to get the camera back. I really like the MIUI Camera app. (For the time being, I'm using Camera ICS, Instagram and Fast Burst camera to capture some of the moments with my little one! :( )

Thanks in advance!