Error : Failed to pull images installing with helm chart 6.8.0

Newly Installed Gitlab with 6.8.0 Helm Chart

Will fail to pull certain images, namely :

Webservice, Migration and Sidekiq.

Screenshot :

How can I point the subcharts, to a correct version of the container image which isn’t being pulled ?
I am using gitlab-ce. I am reinstalling after this issue seemed to have arisen, but unsuccessfully.

I am using any particular custom value, how can I prevent this from happening again ?

Many thanks in advance for your help.