Strange new error when deploying. Failed to fetch...

I've been able to deploy this app several times so far without any issue. The only major recent change I added is library(liquidate), but that doesn't seem to be clearly linked to the issue. See the full output below. Error seems to primarily be:
E: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com/ubuntu/pool/universe/libg/libgeotiff-dfsg/libgeotiff2_1.4.1-2_amd64.deb 503 Service Unavailable [IP: 54.172.25.22 80]

https://perinigraphics.shinyapps.io/vaccinedashboard/? [Y/n] Y
DONE
Uploading bundle for application: 3570025...DONE
Deploying bundle: 4228033 for application: 3570025 ...
Waiting for task: 872306084
building: Parsing manifest
building: Building image: 4825220
building: Installing system dependencies
################################ Begin Task Log ################################
[2021-02-16T03:08:14.198495947+0000] Execute script: packages/build/units.sh

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
################################# End Task Log #################################
Error: Unhandled Exception: Child Task 872306085 failed: Error building image: Build exited with non-zero status: 100
In addition: Warning messages:
1: invalid uid value replaced by that for user 'nobody'
2: invalid gid value replaced by that for user 'nobody'

maybe run apt-get update or try with --fix-missing ?

Well without me running either of those, or making any changes of my own, it decided to successfully deploy today shrug