How to fix error in pip?

Question

pip

Python is installed on the VPS server. When downloading via pip, it gives the following error:

How to fix it?
I tried these options:
1) disable ipV6
2) reinstall python (I have version 3.8)
3) and add domains with this command pip install --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org
I don’t even know what pypi.org is blocking (although it pings calmly from this virtual machine)

Answer 1

See here or here .