What This Error Means
Docker cannot push the image because the tag does not exist locally, so you need to tag the image correctly before pushing.
How to Fix It
List tags and confirm the tag exists (registry UI/API varies by registry).
Check platform/arch and try an explicit platform pull:docker pull --platform linux/amd64 <image:tag>
Ensure the repository path is correct and you are pulling from the intended registry.
Why It Happens
The tag does not exist in the repository.
The image exists but does not include a manifest for your OS/arch.
You are referencing the wrong registry or repository path.
How to Verify
Pull the corrected tag/platform and confirm it succeeds.
Run docker image inspect <image:tag> after a successful pull.
Examples
Error pushing to registry: Tag does not exist: <tag>Prevention Tips
Publish multi-arch images when you support multiple platforms.
Use explicit tags and avoid relying on latest.