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

Failed to restore: Cache service responded with 400

Failed to restore: Cache service responded with 400

Failed to save: <h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0TI+7aAAAAACB5ufzE8zhTYMvjH3fl3IdQlkzRURHRTAxMTMARWRnZQ==

Failed to save: <h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>04I67aAAAAABrIYy3TjefRYc61pBuJop0UEFPRURHRTA2MjIARWRnZQ==

Failed to restore: Cache service responded with 400

Failed to restore: Cache service responded with 400

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 'd:\cygwin\wrapperbin\opam.cmd' failed with exit code 20