LEXIA CORE 5 does not run in a browser on this device - Error Message
In most cases when you experience this error message it indicates that the Safari Website Data needs to be cleared.
On your iPad
Go to Settings > Safari > Clear History and Website Data and click that button. See screen. shots below.
If it asks how much history to clear, pick All History.
If it doesn't fix the issue, please put the iPad aside in an obvious place and put in a help desk ticket.
To prevent this from happening again you may also want to have the iPad close all tabs every night.
To do this:
Go to Settings > Safari > Close Tabs > Choose "After One Day"