Question Parsing the package error while testing on phone

Hi, I am in big trouble when I build the apk and try to test it on my android phone it gives me the error that->

There was a problem while parsing the package.

Please help to fix it so I can move further please reply to my question?

 

Is there anything else in the error message that can help us understand the problem? A screenshot would certainly help

 

Hi, the problem is set up but one new problem when testing on device screen adjustment is not set up some object appears small in screen or big please guide me related this camera and canvas are not setting properly please help me or you can create an empty object with the camera set up and canvas that would be very helpful. I hope you would help me regarding this.

 

We'll need a video or a screenshot i think to better understand the problem - are you able to provide these?