Dear George,
some users and the lovely people from @Patent2net reported that family responses from OPS stopped yielding bibliographic information for some weeks already. This broke some features of Patent2Net [2] as well as PatZilla [3].
As outlined on [1], it looks like only POST requests would fail while GET requests would still succeed.
With kind regards,
Andreas.
[1] https://meta.ip-tools.org/t/bibliographic-data-missing-from-ops-family-response/161
[2] https://github.com/Patent2net/P2N-v3
[3] https://github.com/ip-tools/ip-navigator