If you are running “bolt.diy” in a dev environment the application Ex: docker compose up --build app-dev
You would have to modify the Dockerfile file, go to the end of the file and modify the server startup command to include the correct headers for COOP: original command: #CMD [“pnpm”, “run”, “dev”, “–host”, “0.0.0.0”]
update to this: CMD [“pnpm”, “run”, “dev”, “–host”, “0.0.0.0”, “–”, “–headers”, “Cross-Origin-Opener-Policy=same-origin; Cross-Origin-Embedder-Policy=require-corp”]
save the changes and restart the container:
docker compose build --no-cache && docker compose up app-dev
This solves the problem at least in a dev environment since in production it should work if you activate the SSL certificates.
more info to add COOP on some more common web servers: Configuring Headers | WebContainers
