Why doesn't Google accept sitemap.xml?

Question

Google

About a month and a half ago, I made a website on the pp.ua domain (a free domain for Ukraine). The domain is new and clean.
Made sitemap.xml.
I add to the poison - ok.
I check through the old google search console - ok.
I send to Google - "Status - Not received", "Could not process the Sitemap file".
I re-read a bunch of information, they discuss it on the Google forum, but there is no solution.
Maybe someone met this? Maybe the problem is in the pp.ua domain?

Answer 1

Does the browser open the link? Size no more than 50,000 and 50 mb

Answer 2

I have the same thing on a site with a domain pp.ua