The process '/Users/runner/hostedtoolcache/opam/2.1.6/arm64/opam' failed with exit code 20

The process 'D:\cygwin\wrapperbin\opam.cmd' failed with exit code 20

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

An error has been caught in some system package index files, so the system package index files have been re-synchronised, and the system package installation has been retried: the process '/users/runner/hostedtoolcache/opam/2.1.6/arm64/opam' failed with exit code 20