TL;DR The one-command unblock: pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org <package>. It tells pip to skip certificate verification for those two hosts. Encryption stays on, identity checking goes off. The cause is almost always a corporate proxy or antivirus that re-signs pypi.org …
Read Moregit@github.com: Permission denied (publickey). fatal: Could not read from remote repository - What It Means and the 5-Minute Fix (ssh-keygen, add the key to GitHub, ssh -vT to see which key is offered, or switch to HTTPS with a token)
TL;DR What it means: your git clone, pull or push used the SSH URL (git@github.com:user/repo.git), the SSH connection worked, but GitHub was offered no key it knows. GitHub then refuses, and git reports fatal: Could not read from remote repository. It is never a network problem and never a git-version problem. See the …
Read More
TL;DR The error means your client does not trust the issuer of the server's certificate. Three wordings, one cause: self-signed certificate in certificate chain (a private CA signed it, and the server sent the chain), self-signed certificate (the leaf signed itself), unable to get local issuer certificate (the server …
Read More