The process '/opt/hostedtoolcache/opam/2.1.6/x86_64/opam' failed with exit code 20

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Failed to save: Unable to reserve cache with key v1-setup-ocaml-opam-2.1.6-sandbox-linux-22.04-x86_64-ocaml_base_compiler_4_10_2-2024-21, another job may be creating this cache. More details: Cache already exists. Scope: refs/pull/181/merge, Key: v1-setup-ocaml-opam-2.1.6-sandbox-linux-22.04-x86_64-ocaml_base_compiler_4_10_2-2024-21, Version: 89bf6d549a2a5b3d63419528b7075df0446892a5cd8ab0102c9f39ffed6a4edc