This error message happens when the static deployment exceeds our size limits. We are looking into why this would be happening with your Repl and will follow up once we have an update!
Update: We are still looking into this issue. Our limit for static deployments is currently 1GB, which could explain why you are seeing the issue (if you are using / as the static directory, it will include everything in the working directory)
Instead, can you try creating a separate directory such as public, move your files into it, and set that as the static directory for your Deployment? Then, try redeploying and see if that works!