Problems with extra white-space

Hi,

I installed this plugin and after that, my site map stop working. I looked and it seems to be something with white space before php code. All errors went after load backup before install. See links below of issue.
I have latest version of wp6, php8 and OpenLitespeed server

https://yoast.com/help/xml-sitemap-error/
https://updraftplus.com/problems-with-extra-white-space/