Open-Notificaties deployment fails because of Nil compare

[jeroenvermeulen]

Error:

Error: INSTALLATION FAILED: template: open-notificaties/templates/deployment.yaml:17:31: executing "open-notificaties/templates/deployment.yaml" at <include (print $.Template.BasePath "/configmap.yaml") .>: error calling include: template: open-notificaties/templates/configmap.yaml:27:9: executing "open-notificaties/templates/configmap.yaml" at <not>: wrong number of args for not: want 1 got 3

Context:

$ helm version
version.BuildInfo{Version:"v3.15.1", GitCommit:"e211f2aa62992bd72586b395de50979e31231829", GitTreeState:"clean", GoVersion:"go1.22.3"}
$ kubectl version
Client Version: v1.30.1
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.29.3