Uploading artifacts fails with error 500

I just updated my runners to 0.7.0, and uploading artifacts fails:

Archiving artifacts...
INFO[0000] Creating archive artifacts.tgz ...           
dist/
dist/REDACTED.whl
dist/REDACTED.whl
INFO[0000] Done!                                        
Uploading artifacts...
2.4M	artifacts.tgz
curl: (22) The requested URL returned error: 500 Internal Server Error

ERROR: Build failed with: exit code 1

This is on a private repository hosted on gitlab.com, with my own runner installation (running on debian, using docker).