Additional Study Information: The reason for this study is to find out if the experimental study drug, tesevatinib, is effective as a possible treatment for recurrent glioblastoma. Certain genetic information about your tumor will also be collected, by drawing blood, to help better understand why tesevatinib did or did not work in treating your recurrent glioblastoma. Although tesevatinib has been given to people with other cancers, to people with polycystic kidney disease, and to healthy volunteers, this is the first study in which it has been given to research subjects with recurrent glioblastoma.