Additional Study Information: GEN-011 is an experimental treatment being evaluated in adult patients with advanced cancer. GEN-011 is a T cell therapy made specific to each patient, using the patient's own circulating immune cells. First, the cancer proteins that are already recognized by the patient's T cells are found. Then, immune cells that recognize these cancer proteins are multiplied many times to create the GEN-011 cell therapy. The personalized GEN-011 is then given back to the patient in one or more intravenous (IV - into the vein) infusions. Cancers may include bladder cancer, kidney cancer, lung cancer, colon and rectal cancer, head and neck/oral cancer, and melanoma.