Fail to run application in Release mode but able to run in Debug mode

[MNag]

I am running my application without any problem in debug mode but when i try to run in release mode it is giving the following error,

"qt.qpa.plugin: Could not find the Qt platform plugin "windows" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem."

Qt Version : Qt 5.12.11 MinGW 32bit
Qt creator: 4.15.0
System : Windows 10 , virtual box

Thanks in advance!!

[jsulm]

@MNag How do you start it? From QtCreator?

[MNag]

In the left bottom of qt creator i selected build type Release, attached image

[jsulm]

@MNag That should work.
How did you install Qt?

[MNag]

Through open source offline installer. (qt-opensource-windows-x86-5.12.11)