dgy I don’t know why this situation occurred,can you help me?
Try to reinstall conda (make sure that everything from conda is deleted on your system, including your user configuration files with channels etc., before installing it again), reinstall ARTIQ, and then do "conda install artiq-5.6911.e9b78b62.beta-0.tar.bz2" with the file I posted above.
If the problem persists, try using the same Anaconda version that we have (Anaconda3-2019.03).
Note that the ARTIQ manual recommends using Linux and Nix instead; one key reason for this is conda is particularly buggy and constantly breaks in this very kind of way.