I was at the Extend Your Reporting Strategy with AppExchange which requires me to install the salesforce crm dashboards app. After log in salesforce and click get it now, it shows me the message below. I double checked my salesforce profile. I was indeed system administrator. I refreshed and loged in and out several times and it still doesn't work. Can anyone help? Thank you.

To keep your Salesforce secure, only system administrators have permission to install apps or components. Please contact your Salesforce system administrator to install this app or component.
Or if you're feeling adventurous, sign up for a new free trial of Salesforce so you can install and try out the app or component on your own.

Finishing the last challenge of the picklist administration Trailhead Module results in an error message, I cannot solve - see screenshot. Any ideas? I promoted the field to a global picklist, created the new field based on the global value set as requested...