After a grep command ( grep -r 'DashboardPageContentOuterDiv' )
I found that the string DashboardPageContentOuterDiv is in portalcontent.css
Where the CSS class "DashboardPageContentOuterDiv" is defined isn't going to help you. Even if the class doesn't exist at all you will just not see the style defined but that class.
What version did you migrate from? What kind of customization do you had in the original version? What kind of customization did you migrate to the new one?
I'm migrating from Oracle BI 184.108.40.206.0 to 220.127.116.11.0
In a dashboard there is an analisys with a static text and a table.
In the table I load some data.
The static text has markup HTML: I use "ICO_LIB_standard.js" to load Google map from cache o from Google ( there is a function to produce the URL for retrieving the tile layers desidered ).
In the script of the static text there is a function to create an iframe for content with a target page as MyFile.html
The file MyFile.html load some js library and a function to call the function in ICO_LIB_standard.js
I can try to do a new one simpler to do only the iframe and I can debug it.
Moving from 18.104.22.168 to 12c isn't really supported (you would have to first move to 22.214.171.124 or 126.96.36.199 first in theory).
And it looks like the issue is more related to your own customization.
Identify exactly what is generating the issue, if it is your own custom code (JS etc.) then it's up to you to fix it and make it work as it's a customization ...
Are you migrating directly from 188.8.131.52 to 12c? Oracle's 11g - 12c migration documentation states that the migration should be done from 184.108.40.206 and above.
I would strongly recommend that you upgrade to 220.127.116.11 or higher 1st before the migration and see if this corrects these issues that you are experiencing.
I produced a little dashboard+analysys to focus the problem.
In the old Oracle BI version the dashboard load Google maps, Google maps from cache and detail maps from Mapviewer.
In the new version It doesn't load maps from Mapviewer.
I'm going to check the migration of Mapviewer.
I let you know.
Sorry for my late reply.
I'm having problem with Mapviewer ( 18.104.22.168 ) migrated on Linux. I think that this is the cause.
I can close the case and I can open a new one.