legacy lite ui servlet mapping causes error

{"pagers":{},"hideShows":{},"addTextAreaTag":false,"guiAjaxSessionProblem":"There was an error communicating with the server. Your session probably expired. You will be redirected to log in again.","actions":[{"alert":"Error: Cant find logic for URL: ArrayList size: 2: [0]: appHtml\n[1]: grouper.html\n"}]}