Rush exported a 1kb mp4

I have read other threads about the HEVC error which I am getting but many people have bought Rush, I haven't.. I'm just using the features available in the photography subscription.  Am I entitled to support from Adobe for this?

I have spent weeks working on a video in Rush.  I have the photography plan and did not use any of the pay features of Rush when making my video. Occassionally I would get a message "this file requires the hevc codec which is included with a creative cloud membership" but I would click ok and I would have no issues playing/editting my videos so thought maybe this was just a bug. I spent a couple of hours exporting my video and when it was done it gave me a 1KB file.  I've since updated my creative cloud but it says my Rush was already up-to-date (v2.5).  I also bought the HEVC codec from the Microsoft Store. I'm running Windows 10.  I was able to save a similar travel video a month or two ago so I'm not sure what changed.  My video sources are the same between that video and this one -- a Canon DSLR, Go Pro 8, iPhone, Motorola phone, and a DJI Drone.

I'm trying the export again but not feeling very confident.