Can't create SLO with Mimir datasource

Good afternoon,

I’m trying to make use of the SLO feature in Grafana cloud but I am unable to create an SLO with my prometheus datasource. The error that I am getting says that SLOs can only be created with Mimir datasources, but the datasource I’m using is a Mimir datasource (although it’s not the default one). I am able to go through the whole SLO wizard and I get the error at the very end.

Are there any other requirements that I’m missing? My datasource is a prometheus datasource with a type of Mimir using version >2.9.

Thanks!
Haydn