The readiness check is currently bugging me a lot.
The only error I have to resolve is this:
The “https://repo.magento.com/packages.json” file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
update [–prefer-source] [–prefer-dist] [–dry-run] [–dev] [–no-dev] [–lock] [–no-custom-installers] [–no-autoloader] [–no-scripts] [–no-progress] [–no-suggest] [–with-dependencies] [-v|vv|vvv|–verbose] [-o|–optimize-autoloader] [-a|–classmap-authoritative] [–apcu-autoloader] [–ignore-platform-reqs] [–prefer-stable] [–prefer-lowest] [-i|–interactive] [–root-reqs] [–] …