Installing via helm proxy errors if not using official remote

Steps to reproduce.

• Create helm proxy
  name = helm-proxy
  remote = https://repo.chartcenter.io/
• Go to helm client and try to install bitnami/mysql

• helm fetch <repo_name>/bitnami/mysql

Actual:

The package was not installed.

Error: Failed to fetch http://host.docker.internal:8081/repository/helm-proxy/mysql-6.14.11.tgz : 404 Not Found

Expected:

bitnami/mysql was installed. No errors.

Looks like a problem with the metadata we are storing. Inside the nexus metadata, notice that the that URLs path is incorrect:

It should be: bitnami/mysql-6.14.8.tgz instead of mysql-6.14.8.tgz.