API not returning any data; 500 Internal Server Error since 2025-01-13@00:00:00Z

Since 2025-01-13@00:00:00Z calls to https://api.carbonintensity.org.uk/intensity are returning:

{"error": {  "code": "500 Internal Server Error",  "message": "Requested resource not found."  }}

Is this a known issue? Any ETA for it to be resolved?