Looks like I have a weird issue with this even with latest 5.7.7.x release when I tried to upgrade today. Out of all the cameras, I have 2 5442 (IR) version that's giving bunch of warning messages below about failed getevents 8000ffff even though ONVIF triggers seems to be working fine.
In the onvif logs for the camera itself, i'm seeing similar error message kferrro posted about "Wsse authorized time check failed.."
If I do a Find/Inspect on the camera, it doesn't work. Reverting back to previous stable version 5.7.4.2 and I have no issue with Find/Inspect or the 8000ffff spamming message.
1 5/26/2023 3:05:05.493 PM GardenCam Events: request 8000ffff
1 5/26/2023 3:05:07.514 PM GardenCam Events: request 8000ffff
1 5/26/2023 3:05:08.288 PM PatioCam2 Events: subscription 8000ffff
1 5/26/2023 3:05:09.523 PM GardenCam Events: request 8000ffff
1 5/26/2023 3:05:11.309 PM PatioCam2 Events: subscription 8000ffff
1 5/26/2023 3:05:11.534 PM GardenCam Events: request 8000ffff
1 5/26/2023 3:05:13.543 PM GardenCam Events: request 8000ffff
1 5/26/2023 3:05:14.321 PM PatioCam2 Events: subscription 8000ffff
1 5/26/2023 3:05:15.564 PM GardenCam Events: request 8000ffff