Ingestor failing after upgrade to 2.4 - microservices mode

`level=error ts=2021-12-14T20:06:29.592570417Z caller=log.go:106 msg=“error running loki”

All I did was helm repo update and then helm upgrade but now I’m getting the below error

err=“mkdir wal: read-only file system\nerror initialising module: ingester\ngithub.com/grafana/dskit/modules.(*Manager).initModule\n\t/src/loki/vendor/github.com/grafana/dskit/modules/modules.go:108\ngithub.com/grafana/dskit/modules.(*Manager).InitModuleServices\n\t/src/loki/vendor/github.com/grafana/dskit/modules/modules.go:78\ngithub.com/grafana/loki/pkg/loki.(*Loki).Run\n\t/src/loki/pkg/loki/loki.go:285\nmain.main\n\t/src/loki/cmd/loki/main.go:96\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:255\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:1581”`

No other errors.