This is a known bug with AOI version 5.16.6, which unfortunately we do not currently have a fix for. However, this should be addressed when a newer version of AOI is released.
This error occurs when there are no data connections in AOI administrator for either Dimensions, Access Financials, or Access Supply Chain.
Fix / Workaround Solution
You need at least one valid data connection in AOI Administrator for either of the above products. If you have either of these products then please create a data connection to resolve the error. To do this:
Open AOI Administrator
Click Data Connections
Create a new data connection for the appropriate product mentioned above which you have.