The file is WAY TOO BIG for the length.
To conserve server space it is best to render as small as possible.
When rendering, try these settings:
Sample Rate: 16,000 Hz
Channels: Mono
Resample mode (if needed) Low (Linear Interpolation)
Quality: Custom
kbps: 16
This brought a 3 mb file down to 403kb.
The file you rendered was set at 128kbs when 16kbs would suffice.