Spike in amount of '400 Bad Request' errors on DeviantArt

[zakman4466]

Over the past couple of days I've started receiving a large number of '400 Bad Request' errors when downloading from DeviantArt. Haven't made any major changes to my config and have removed what few minor changes I've made. Have gone as far as getting a new 'client-id' and refreshing client-secret & refresh-token - no changes. Anyone else experiencing this? Relevant config section below:

"deviantart":
{
"watch":
{
"directory": ["deviantart", "Watched", "{user[id]}"],
"archive-format": "wl_{username}{index}.{extension}"
},
"client-id": "XXXXX",
"client-secret": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
"refresh-token": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
"archive": "f:/gallery-dl/archive.sqlite3",
"cookies": ["firefox"],
"include": "gallery",
"directory": ["deviantart", "{user[id]}"],
"folders": false,
"journals": "none",
"mature": true,
"metadata": false,
"original": "images",
"quality": 100,
"extra": false,
"skip": "enumerate",
"wait-min": 1,
"filename": "{author[username]}_{title}.{extension}"
},