Error reading .mov (RGB + Alpha)

[Joao Pedro5C73]

Hello. I'm having some problems when I try to import .mov with rgb + alpha for the timeline.
The program cannot read the file, so it freezes the entire project, including the audio. When I delete
file from the timeline, it works perfectly again.

[R Neil Haugen]

What exactly is that file? And made by what? What's the format/codec?

Neil

[Joao Pedro5C73]

Hello, Neil.

Its a simple lower third, created and exported with after effects.
I used this preset to export:

Format: Quicktime (.mov)
Channel: RGB + Alpha

It freezes the program when i try to play it.
And here is the thing, if i use the stable version of Premiere (14.7v), it works perfectly.
I just don't know how to fix it in the beta version.