Hi,
Did anyone with SAP_ALL try this 'Display cube data' in your org ?
From your 'manage' screenshot, its evident that data is safe, but you are not able to just see it. It could be auth related.
Since 7.4 uses analysis authorizations, are you sure everything is ok on that aspect too?
You indicated you ran the data load. Didn't indicate if its a process chain or manual infopackage run.
Process chain will be run by BWUSER, not under your user id. So try that too.
If BWUSER is not having enough auth, process chain's data load could fail too.
When displaying cube data, does it give any message.
Auth problems generally shows a message and then shows this empty cube data screen.
Also check the 'Filter' in the cube display data screen. sometimes it has some old filter and displays no data. once you remove the filter data will be displayed.
.