That's about 4.75% free space left; windows needs a minimum of 20-25% free space in order to do it's internal housekeeping and perform the disk cleanup tasks. You need 25% free of 32GB free space, about 24GB used; 8GB free (versus the 1.52GB you have free now). Currently you don't have enough free space for this utility to correctly run.
Follow Josephur's recommendations and see if you can get to either of these numbers (25% free/8GB free).
Next, remove any unused or unneeded programs using Programs and Features applet. Only keep the essentials.
You may then need to copy or backup data files starting with movie/video files and then music and then pictures. Backup to external media such external hard drive, flash drive...