Re: Getting invalid credentials when configuring Zephyr Scale with Jenkins
Resolved my issue. Turns out that Zephyr Scale had not been properly activated for a Project. Setting up Jira in Docker, the initial admin account was a Jira Administrator. I had to enable Jira System Administrator permissions in Settings > Global Permissions to my account. Once I did that, I was able to activate Zephyr Scale for my Project, and was no longer getting the invalid credentials error in the Jenkins configuration pane for Zephyr Scale.
Could you please try @MrP's steps and check if Zephyr Scale is enabled on your project? Since you're using the cloud version, you won't see the Global Permission option in Jira settings, but you'll see whether the project is enabled by selecting it and then going to Zephyr Scale or by opening the project settings and click on the Zephyr Scale menu in the sidebar.