The OCSP responder problem still exists, for all Java 17.0.4+ and 21.0.0+ users. See
phase4#124 for technical details. This page now uses CRL instanceof OCSP to work around the issue.
Querying the following SMP for iso6523-actorid-upis::0088%3A4829900030766:
Seems like the participant ID iso6523-actorid-upis::0088%3A4829900030766 is not known in any of the configured networks.