Can't access NewsBlur on iOS due to SSL error

For the last three days I have been getting this error:

An error occurred during a connection to newsblur.com. SSL received a record that exceeded the maximum permissible length.

Error code: SSL_ERROR_RX_RECORD_TOO_LONG

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.

It does end up working toward the end of the day.

I am on a Surface using the LibreWolf browser, and my ISP is Xfinity. I’ve been able to use the site up until this week.