I am on Windows 10, I had the problem with a new fresh installation of Anaconda on python 3.7.4, this post on github solved my problem:
( source: https://github.com/conda/conda/issues/8273)
I cite:
" My workaround: I have copied the following files
libcrypto-1_1-x64.*
libssl-1_1-x64.*
from D:\Anaconda3\Library\bin to D:\Anaconda3\DLLs.
And it works as a charm! "