Install Kubernetes Dynatrace Operator Error

[MMM_01]

I am facing an issue when trying to install Dynatrace Operator by Script:

helm install Dynatrace-operator oci://publick.ecr.aws/Dynatrace-operator --create-namespace --namespace dynatrace --atomic

following error received:

Error: INSTALLATION FAILED: GET https://public.ecr.aws/v2/dynatrace/dynatrace-operator/tags/list: unable to retrieve credential.

Which credential is required & how to proceed with installation 

Thank you

[Julius_Loman]

You have typos (capital letters and incorrect domain name) in the helm command, it should be:
helm install dynatrace-operator oci://public.ecr.aws/dynatrace/dynatrace-operator --create-namespace --namespace dynatrace --atomic

However, this does not explain the error. Do you use http proxy in your environment and is the cluster allowed to pull images from Internet (public.ecr.aws repository)?

[gopher]

As mentioned above - Try following these steps instead.

Use a public registry — Dynatrace Docs
Use a private registry — Dynatrace Docs

They should resolve your issue.  the above error is indicating that you have not passed the required registry credentials for accessing the image - this can happen if you are behind proxy.

Also, you can pass the no-proxy flag in your command which will prevent this as well.