It's definetly a problem of the OpnSense installation.
More technical details here: https://github.com/opnsense/core/issues/9113
Same config in a different instance is not showing this bug.
Further investigation showed a corresponding error message in the OPNSense logs.
Looks like a class is "missing".
The file is present and in the correct location (compared two systems).
Would expect it is some broken file or class path.
The big question where and why.
The why, maybe the crash or a update problem.
More technical details here: https://github.com/opnsense/core/issues/9113
Same config in a different instance is not showing this bug.
Further investigation showed a corresponding error message in the OPNSense logs.
Looks like a class is "missing".
The file is present and in the correct location (compared two systems).
Would expect it is some broken file or class path.
The big question where and why.
The why, maybe the crash or a update problem.