Hi, I am facing the same error. We are migrating from UNIX to LINUX server and on the LINUX server the weblogic version is 12.1.1. I am getting the below error right on login page of the web application:
Error 500--Internal Server Error
java.lang.ClassCastException: Unable to convert "1" to type "javax.el.ValueExpression" for attribute "columns"
Could you please let me know the reason for this and the resolution? Thanks much!
Have you been able to find any further details on the issue? Please let me know\