Whenever I render the project in Evee as png files, they're all the same frames So I made a project where I had motion captured my face and have applied the movements through tracking and bones on my Head Object. I had followed this tutorial :  https://youtu.be/uNK8S19OSmA

Now whenever I play the animation in my viewport, it works perfectly, but when I hit Ctrl f12, it renders the animation as png images in the folder I had specified, but all the png files seem to be exactly the same.
I also made sure that the Render Step in the output menu was set to 1, but it did not help.
Here's the mediafire link to my project : 
 https://www.mediafire.com/folder/ixo913oiuelm6/

Can anyone suggest a solution??

Thanks
Seems like the range of your Start and End was only 1 or several frames? Check if the frame range is correct.