"Add swatch"is grayed out in PS 2020

The "add swatch" button at bottom of panel is grayed out in my PS 2020. Other options are also grayed out when I expand the panel from top right bars.  I want to add my own folders and add swatches I like in them.  I was able to create a folder and a subfolder, but the "add swatches" is still gray.  I tried some things such as hold down the option key on my iMac to add the foreground color, but the add swatch is still gray.  I tried to drag a recently used swatches to the folder..nothing.  There doesn't seem to be a box/space to hold them. The v shows that the subolder should be open. I have an iMac running Mohave. I don't even want to update to Catalina and deal with all those problems. I don't know what I am doing wrong.  I have only used older Photoshop programs before subscriptions.  Thank you for any help.