Adding my own JFROG repository to Rancher server

I am trying to add my own private repsitory - JFROG Artifactory Pro On-Prem - Docker registry.
I have Rancher server installed version v2.6.8.
I tried to add it in the Repositories tab, selecting “HTTP URL to an index generated by Helm”/
I have selected in Authentication: “Create HTTP Basic Auto Secret” and insert my credatialns (user name and password).

However, after creating the repository I am getting the following error uder the new repository name that I created:
“Failed to parse response from

what am I doing wrong? do I need to install first Helm in order to add the repository?