failed to fetch an image or build from source: error building: failed to solve: Canceled: context canceled

...
 => CACHED [base 2/2] WORKDIR /app                                                                                                     0.0s 
 => [build 1/6] RUN apt-get update -qq                                                                                                 4.5s
Error: failed to fetch an image or build from source: error building: failed to solve: Canceled: context canceled

I have already tried: running fly deploy with --local-only, deleting dockerfile and creating a new one, deleting fly.toml and creating a new one

fly doctor output:

fly doctor 
Testing authentication token... PASSED
Testing flyctl agent... PASSED
Testing local Docker instance... PASSED
Pinging WireGuard gateway (give us a sec)... PASSED
Testing WireGuard DNS... PASSED
Testing WireGuard Flaps... PASSED

App specific checks for [redacted]:
Checking that app has ip addresses allocated... PASSED
Checking A record for [redacted].fly.dev... PASSED
Checking AAAA record for [redacted].fly.dev... PASSED