Currently there is a problem with the way the new list experience mode renders the Ribbon items for the HPE Content Manager SharePoint Governance and Compliance App. Some are repeated and do not correctly launch the associated dialog.
In addition if certain SharePoint site columns created by the Configuration Tool are added to a list with either the ‘Default experience set by my administrator’ or ‘New experience’ option selected, there will be an error when trying to browse the list.
The workaround is to make sure the list is set to use the ‘Classic experience’ option.
For further information about the new list experience settings please refer to : https://support.office.com/en-us/article/Switch-the-default-for-lists-or-document-libraries-from-new-or-classic-66dac24b-4177-4775-bf50-3d267318caa9