My website is in cyrillic, could that be causing the issue ?
I also now have this error too:
Missing XML tag
1 instance
This required tag is missing. Please add it and resubmit.
Examples
Line 5
Parent tag:
urlset
Tag:
url
I just downloaded one of the .xls files that gives an error and this is what I found:
Warning: file_exists(): Unable to find the wrapper “https” – did you forget to enable it when you configured PHP? in wp-content\plugins\google-sitemap-generator\sitemap-core.php on line 1176
I managed to fix that issue by enabling the extension openssl. When I download the file itself – there is no error, but on sitemap validators I keep getting them (on Google my error count keeps growing too).
This is the error from one of the sitemap validators:
“All values in a Sitemap must be entity-escaped. Please check to make sure that your URLs follow the RFC-3986 standard for URIs, the RFC-3987 standard for IRIs, and the XML standard.”
Thanks for sharing the solution with the community @workingbee312!