The 4.5 release of Metasploit Pro introduces a complete redesign of the existing social engineering feature. If you have campaigns that you created with Metasploit Pro versions 4.4 and earlier, you can still access them to generate reports. However, you cannot run a legacy campaign in Metasploit Pro 4.5 or migrate the campaign content over to the new style of campaigns.
To access legacy campaigns, use the following URL: https://<metasploit_instance>:3790/workspaces/<n>/campaigns, where
n represents the workspace ID assigned to a project. For example, the default project has a workspace ID of 1, so to access the old campaigns for that project on the local Metasploit instance, use the following URL:
https://localhost:3790/workspaces/1/campaigns.