at checkout thank u page gives critical error

Hello Prithvi,

Thank you for contacting WooCommerce support.

I understand that the Thank You page is showing a critical error.
I placed a test order to recreate the issue.

May I ask when this issue started?

To troubleshoot this, go to WooCommerce > System Status > Logs and check for any fatal errors.
If you find anything, share it with me.

Lastly, please share your site’s System Status Report with me.
You can paste it into https://pastebin.com and share the link here.

Looking forward to your response. ??