WordPress GiveWP Plugin showing blank page

I am using the GiveWP plugin with a U-Design theme.

The donation page shows preloader for short time then turn into a blank page:

I.E. In this page: https://www.podrsd.org/donations/support-needy-families/

I noticed in Googe Chrome Browser’s DEV Tool that there are sometimes 11 elements with ‘Slow network detected’ and jQuery-Migrate-3.3.2 is sometimes loaded sometimes 2 times!

Could this be the problem why the donation page is turned, Blank?

When I deactivate the U-Desing theme and Activate the 2022 theme it works perfectly.

PHP version is 8.0.1 and Error Reporting is enabled in PHP.INI but I don’t see any error.

Please advice.

Note: I created a WordPress Stackoverflow post here:
https://wordpress.stackexchange.com/q/409585/224466

The page I need help with: [log in to see the link]