Camunda 8 Helm Error at <.Values.image.tag>: can't evaluate field tag in type interface {}

[VivianXiaRbc]

I am deploying Camunda 8 Helm chart 9.0.1 to kubernetes in our company internal cloud, but got an error of <.Values.image.tag>: can’t evaluate field tag.
Our company internal cloud does not support helm native command, but it use helm template command first to generate Kubernetes yaml first, then execute k8s yaml

+ helm template --name-template=camunda-platform-helm . -f values/dev-a/values.yaml --set app_name=camunda-platform-helm

I have already supplied image.tag field in values.yaml.

Below is the error log

2024-06-11T18:11:13.345Z] Error: template: camunda-platform/templates/operate/tests/test-connection.yaml:6:3: executing "camunda-platform/templates/operate/tests/test-connection.yaml" at <include "operate.labels" .>: error calling include: template: camunda-platform/templates/operate/_helpers.tpl:23:8: executing "operate.labels" at <include "camundaPlatform.labels" .>: error calling include: template: camunda-platform/templates/camunda/_helpers.tpl:55:18: executing "camundaPlatform.labels" at <.Values.image.tag>: can't evaluate field tag in type interface {}

[2024-06-11T18:11:13.346Z] helm.go:84: [debug] template: camunda-platform/templates/operate/tests/test-connection.yaml:6:3: executing "camunda-platform/templates/operate/tests/test-connection.yaml" at <include "operate.labels" .>: error calling include: template: camunda-platform/templates/operate/_helpers.tpl:23:8: executing "operate.labels" at <include "camundaPlatform.labels" .>: error calling include: template: camunda-platform/templates/camunda/_helpers.tpl:55:18: executing "camundaPlatform.labels" at <.Values.image.tag>: can't evaluate field tag in type interface {}

[Jagmohan_Dixit]

This error is due to the type of variable image, It might be possible the variable image variable doesn’t contain tag as sub field, like

image: 
tag: 

Or it might be possible that helm is getting value of image variable from some other values file which is overriding value of image,

#First value file
image:
   tag:
# Overriding values file
image: 

Now as there is no sub field of image variable in overriding values file it is giving type interface error.

[VivianXiaRbc]

The problem is that Camunda helm chart 9.1.1 release contains keycloak subchart, and it defines image tag in subchart values.yaml, which makes global values.yaml did not work properly.