One faulty slo disables all slos

[sw-fox]

What I observed:
when one faulty slo is deployt (the prometheus metric cannot be parsed) in k8s as kind: ServiceLevelObjective, the Web-UI refuses to show any SLO that worked before.

What I expect:
when a SLO cannot be execute it should be ignored, maybe with an error message, but it should not interfere with the working SLOs. The correct SLOs should still be visible.

The version I have used is v0.6.3

[metalmatze]

FWIW the Prometheus recording rules that previously have been successfully loaded are still working and alerting within Prometheus.
I agree with the fact that we should probably in that case handle it more gracefully.