Cannot add outputs

I want to add outputs, but the iotawatt calculator doesn’t show me the save key to add them.
I thought it was the browser but both with chrome and with Edge it shows the same thing, please help

You probably have an invalid name. Output names must begin with an alpha character followed by alpha, numeric or the underscore character for a maximum of 16 characters.

i have this issue today also. tried another browser and its fixed, i was using a chromium based browser (brave) try safari or something not based on chrome.