** WARNING 98731 ** The thickness of element %7d is outside the expected range. Please use Modeling -> Query Entities to locate the element, check the element properties and, if necessary, rerun the analysis.
This message means that there is a problem with the thickness value of the element, meaning it is either too small or too large.
Check the model geometry and mesh by running the Mesh Statistics command from the Mesh menu. In addition, click to view the thickness of the various elements. When you have identified the problem element, select it, right-click and select Properties... and then change the Thickness value.