Hi,
I'm a first time user so please bear with me.
I've created a simple O365 email approval flow when a new item is added to a SharePoint list
the flow is as follows:

I used to run it fine but now when I do i get a Badgateway error on the 'Send an email' step.

How do I fix this BadGateway error? is it something to do with my email?
any help is great thankyou!