Helm3 - Lab 14.1

Ran into the same issue. Executing a 'helm repo update' did not change anything.

[user@cka-master01]$ helm3 repo add stable https://charts.helm.sh/stable
"stable" has been added to your repositories
[user@cka-master01]$ helm3 repo list
NAME    URL                          
stable  https://charts.helm.sh/stable
[user@cka-master01]$ helm3 search repo maria
NAME                CHART VERSION   APP VERSION DESCRIPTION                                       
stable/mariadb      7.3.14          10.3.22     DEPRECATED Fast, reliable, scalable, and easy t...
stable/phpmyadmin   4.3.5           5.0.1       DEPRECATED phpMyAdmin is an mysql administratio...
[user@cka-master01]

Then updated and searched again:

[user@cka-master01]$ helm3 repo update 
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "stable" chart repository
Update Complete. ⎈ Happy Helming!⎈ 
[user@cka-master01]$ helm3 search repo maria
NAME                CHART VERSION   APP VERSION DESCRIPTION                                       
stable/mariadb      7.3.14          10.3.22     DEPRECATED Fast, reliable, scalable, and easy t...
stable/phpmyadmin   4.3.5           5.0.1       DEPRECATED phpMyAdmin is an mysql administratio...
[user@cka-master01]$

The rest of the lab gives some clues on what's happening, some of the debug output from the helm install indicates that this chart is now maintained elsewhere:

<--omitted-->
NOTES:
This Helm chart is deprecated
 
Given the `stable` deprecation timeline (https://github.com/helm/charts#deprecation-timeline), the Bitnami maintained Helm chart is now located at bitnami/charts (https://github.com/bitnami/charts/).
 
The Bitnami repository is already included in the Hubs and we will continue providing the same cadence of updates, support, etc that we've been keeping here these years. Installation instructions are very similar, just adding the _bitnami_ repo and using it during the installation (`bitnami/<chart>` instead of `stable/<chart>`)
 
$ helm repo add bitnami https://charts.bitnami.com/bitnami
$ helm install my-release bitnami/<chart>           # Helm 3
$ helm install --name my-release bitnami/<chart>    # Helm 2

@serewicz , agreed this is just the nature of the beast. I imagine it's an arduous task to keep the labs up to date with how fast things change and the large number of external dependencies. I was just tossing a comment in for folks to hopefully find a solution to this issue in the meantime. Thanks for all of your hard work!

-Futon