Always get URL timeout: HTTP request timeout error on my sitemap. HELP!

No matter what I do with this plugin, my sitemap always gets the “URL timeout: HTTP request timeout” error when I submit it on Google Search Console. I have no idea how to get rid of this error.

Any ideas/suggestions? Anything would be appreciated; I’m fairly new to this stuff.

https://ww.wp.xz.cn/plugins/google-sitemap-generator/