The purpose of this study is to determine whether AUTO1, an experimental form of therapy, is safe and effective in helping the immune system fight cancer. AUTO1 uses immune cells, called T cells, that are collected from the blood using a process called leukapheresis and then modified in a lab to recognize and target cancer cells. These modified cells are then put back into the body through infusion.

This study has two parts. Part A enrolls patients who have been diagnosed with a solid tumor, lymphoma or desmoid tumor that has either come back ("relapsed") or does not respond to therapy ("is refractory"). Part B enrolls patients with a relapsed or refractory Ewing sarcoma, desmoid tumor, osteosarcoma, liver tumor, Wilms tumor, or tumors with changes in a gene family known as the Wnt pathway. This study involves taking a study drug called tegavivint. The study will be testing different doses of the study drug to find the safest dose.