I commented out these lines which makes the rebuild run successfully but the site stuck on splash I think because cannot load assets. 
Safe mode same…
after_assets_precompile:
- exec:
cd: $home
cmd:
- sudo -E -u discourse bundle exec rake s3:upload_assets
- sudo -E -u discourse bundle exec rake s3:expire_missing_assets
Any idea? I know it’s a bad timing… 