SSL error in official demo site

There seems to be a SSL error in demo urls. 

**Tried:**
 - https://manufacturing.erpnext.com/
 - https://demo.erpnext.com/

**Screenshot below:**

<img width="870" alt="Screenshot 2021-07-14 at 1 10 02 PM" src="https://user-images.githubusercontent.com/246454/125582805-7e59f226-abd2-4020-bbe0-0b2b6ec35d80.png">
