Can't Create a Proxy of After Effects files in my timeline

[defaultdb3e9gl13f2s]

I'm working on a project that's starting to get more and more intensive to playback while editing due to After Effects files I placed into the timeline, and Premiere Pro clips I edited in AE. So I decided to create proxies of them (instead of constantly having to render the timeline just to see a new edit I made). However, Premiere Pro did nothing. Media Encoder opened up, but there's nothing in the queue. When I checked the folder I set for proxy files to be saved to, I found the folder empty.

I tried creating a proxy for a normal Premiere Pro clip to be sure if it's only happening to AE clips. And lo and behold, it made a proxy for that clip just fine. Why can't PP make proxies of AE files then?

And before anyone suggests it as a workaround, I'm not gonna export all these AE files into video files to use in PP. I tried, and I don't have nearly enough space on my hardrive to handle over 100GBs of rendered AE files...

[Jeff Bugbee]

And before anyone suggests it as a workaround, I'm not gonna export all these AE files into video files to use in PP. 

By @defaultdb3e9gl13f2s

That's what a proxy file is. I've never created proxies of linked AE projects and I don't think that is possible. (Any other ACP, please correct me if I'm wrong.)

If your project is becoming unwieldy, you can always create previews.

[R Neil Haugen]

For projects with that extensive use of Ae, most of the people I know would export each bit from Ae as a full-on video clip after they're reasonably certain it's 'done'. And replace the comp in the Pr timeline with the clip.

Cuts down the overhead on the computer dramatically.

Neil