Not able to create New page for Experience Site

I am trying to create a new page in my Salesforce Experience Site, but I am getting the following error:

“An error has occurred while processing your request. The salesforce.com support team has been notified of the problem.”

Because of this error, I am unable to create the new Experience Site page.

I have attached a screenshot of the error for reference.

Please help me understand why this error is occurring and how I can resolve it.