sh.itjust.works ... except when it comes to loading images

{"msg":"Error in store"}

Or the longer version:

< HTTP/2 500
< server: nginx
< date: Sat, 15 Jul 2023 06:45:55 GMT
< content-type: application/json
< content-encoding: gzip
< access-control-expose-headers: content-encoding, vary, content-type, date, content-length
< vary: accept-encoding, Origin, Access-Control-Request-Method, Access-Control-Request-Headers
<
* Connection #0 to host sh.itjust.works left intact
{"msg":"Error in store"}