Making a custom cloze-text

Hi folks - One of the big reasons that I pay for Clozemaster is the ability to make my own custom cloze texts. I find this very useful for the language I am learning (Greek). It used to work fine. However, as of the last week or so, I have been unable to use this function, on two separate computers. This is the message that I get:

error #<Errno::ECONNREFUSED: Failed to open TCP connection to (Connection refused - connect(2) for "" port 443)> Sorry about that! Please try again and let us know if you see this message again.

Any ideas? Is is you or is it me? Thank you! AmyJean