"Table can not be converted correctly. Click on red marked indexes for more details" This message implies that the selected table cannot be converted properly by some reason. Click twice on red marked items to solve the problem.
Example: As you can see Order Details table is marked red. It means that some fields or indexes can cause conversion problems.
Click twice on Order Details table, then double click on appeared Indexes. Now you can see that indexes named "OrderID", "ProductID" and "PrimaryKey" provoke the following message: "Error! Not all fields required by index are selected for conversion"". After you eliminate the errors all database objects that were previously marked red won't cause any problems.
"Table can not be converted correctly. Click on red marked indexes for more details"
This message implies that the selected table cannot be converted properly by some reason. Click twice on red marked items to solve the problem.

