Mask isn't exporting correctly to HTML or MP4

[iansmith06]

Hi everyone – 

So I'm kind of stumped on this one. 
I'm building this animated logo, and I want the "Q" in the middle to reveal itself...I set a mask to unveil the letter in a series of frames....and it operates correctly in the AA window. However when I export it out to HTML or an MP4, the mask doesn't function, all I get is this (i've attached a screenshot).

Can someone tell me what I'm doing wrong? I've included the working file as well. Help would be greatly appreciated. 

https://drive.google.com/file/d/1nZHEzVjAyo2FxTvBuP7ZlOn0ya5lB6a-/view?usp=sharing

[kglad]

probably too many nested symbols in the masks.  just use shapes and remove all the unneeded tweens (which is every one of them in the q and check masks).

[iansmith06]

Thanks, I'll give that a shot.

[kglad]

that will work, then.