I had this error and I can’t instal another add-ons
It looks like the problem is very similar to the one posted before and if you’re using VPN or proxy, maybe try to turn it off/on and restart Anki.
Hi Kelciour, thank you so much for the answer. I don’t use anti-virus, only the Windows Security, might you know how I fix that in firewall?
(Sorry for my bad English, I use Anki for study it 
)
On second thoughts, maybe it’s related to your proxy settings. I’m not familiar with the error and after a bit of googling could only suggest to try.
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Open the Debug Console, copy-paste these lines and press Ctrl+Enter.
https://docs.ankiweb.net/#/misc?id=debug-console
import os, requests print('HTTPS_PROXY' in os.environ) print(requests.utils.get_environ_proxies('http://www.google.com'))It should return False and {}. Maybe for you it’ll be different.
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Take a look at the Internet Explorer proxy settings. Maybe Anki somehow could read them too. The proxy should be left unchecked.
https://www.wikihow.com/Enter-Proxy-Settings-in-Internet-Explorer
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Maybe restart your PC.
I’m not sure what else to do.
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