newalphademocrm@boxproduct ~/web1/web $ wget "
https://karnavalprikolov.ua/export_products.xml"--2021-01-28 17:28:02--
https://karnavalprikolov.ua/export_products.xmlRecognizing karnavalprikolov.ua (karnavalprikolov.ua)... 185.67.3.5
Connection to karnavalprikolov.ua (karnavalprikolov.ua)|185.67.3.5|:443... connection established.
HTTP request sent. Waiting for response... Read error (Connection terminated by other side) in headers.
Repeat.
--2021-01-28 17:28:03-- (attempt: 2)
https://karnavalprikolov.ua/export_products.xmlnewalphademocrm@boxproduct ~/web1/web$
It looks like the specified file cannot be obtained just like that. Apparently the User-Agent is checked there (that they are trying to get the file from the browser). If these are some of your partners, check this point with them.