[FIX] CM12 Install from sdcard Application not installed error topic

I got this error I searched a lot before I found the solution. I'll post it here in case some people needs it.

I've just installed CM12 nightly and when I tried to install an APK from my SDCARD, I got an "Application Not Installed" error without any error number.

"unknown source" is turned on in the security setting.

Tried via ADB install and got: [INSTALL_FAILED_CONTAINER_ERROR].

Logcat was showing:

Code:

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E/Vold    (  109): Error creating imagefile (Read-only file system)
E/Vold    (  109): ASEC image file creation failed (Read-only file system)
W/Vold    (  109): Returning OperationFailed - no handler for errno 30

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The solution was to go to Settings -> Applications -> Menu -> Preferred install location

And change "Let the system decide" to "Internal device storage".

Everything is working fine now.

Hope it will help some others !