This error means that there is a column on the report that is pulled from a business view that doesn't exist in the specified metadata file (*.iqk). To check this, double click on each column and make sure it shows a valid business view. But what if you check all columns and all columns are valid?
It is possible to design a report with page settings set to one value and then change the page settings at a later time. This can cause confusion if one or more of the columns are outside of the new page size. For example, if you design a report with a page width of 15, but change it to be 11, that might push one or more columns outside of the visible area. To correct this, go to File>Page Setup and increase the page size back to 15. Then delete the column and reduce the page size back to 11. Then the report will run without this error.