Patients are being asked to take part in this study because they were admitted to the hospital, have COVID-19 and cancer. Our site will participate in both Part 1 and Part 2. Part 1 is being done to find the TL-895 dose to be tested in Part 2. Participants in Part 1 will take TL-895. Part 2 will start after Part 1 is done. Participants in Part 2 will be randomly assigned to take TL-895 or placebo (pill that contains no medicine). Randomly assigned is like the flip of a coin. The study doctor, Sponsor, and you will not know if you are taking TL-895 or placebo.