Google report "HTTP server is returning 0: Internal Server Error"

Our website has 2 links for supporting google’s data safety requirement.
I can access these links without any issue.
But google says “URL provided does not link to a valid page, HTTP server is returning 0: Internal Server Error”

2 links here:

Google seems to verify sites through its tools.
I wonder if it’s different from accessing a site with a desktop browser.
If so, what would be the best way to fix this?

Regards,
Tony