Yeah, looks like /site-api/ was down or smth (commenting returned 503, following just said that the response is null), but it’s back on now
OH MY GOD - i just found out that the scratch devs use stackoverflow!
inspect element the css of the maintenance page, scroll to line 40 of the CSS
.content {
width: 90vw;
max-width: 45rem;
margin: 0 auto;
text-align: center;
font-family: "Helvetica Neue", "Helvetica", Arial, sans-serif;
color: white;
/* hack to prevent content from shifting when scrollbar appears; see
https://stackoverflow.com/a/30293718/2308190 */
padding-left: calc(100vw - 100%);
}