Q: rpki feed failure

Hi friends, a probably simple question that I haven't found any documentation about, so... We're using Cloudflare's RPKI cache from our BIRD instances, but since yesterday I'm getting an error info in `show protocols`: rpki1 RPKI --- up 15:33:17.594 Cache-Error-No-Data-Available What does the error message mean? Does the remote side not have data available, or is this about some local issue? I'd like to clear this up before I ask Cloudflare... Thanks, Elmar.