Error when trying to download user data

What is the error?

It is like an alert that says error and has an ok button.

The only message is error? No description?

I also get this error-message..
“There was a problem with your request. Please try again later.”
But i recieve the Mail correctly an I also could download the data.

• This reply was modified 6 years, 6 months ago by bussemas.

This problem occurred locally. In my website it works correctly, thanks!