getting 503 error when testing search engines

hi
i was testing some searchengines and in all of them I’m getting 503 error 

recently I had to reinstall my windows and then all my software and after that its happening for me , I’m not sure but I think this problem is connected to firewall ports or proxies 

https://www.ecosia.org/search?p={PAGENUM}&q={KEYWORD}
https://parseek.ir/search/?qu={KEYWORD}&p={PAGENUM}

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