Hi there,
Thanks for reaching out! We are sorry for the trouble with Libraries in Photoshop. We are here to help!
Could you please share the version of Photoshop and the version of the operating system you are working on?
Currently, Adobe Photoshop will only allow you to use Color themes via the library panel or the swatch history list. Adding Swatches to Library or adding groups of swatches to Color Libraries is possible. Not the other way around that is, adding color themes back into Photoshop's color swatch panels using drag and drop.
You might have a way to do it, and it will take manual effort.
Apply colors by clicking the swatch in a theme or right-clicking and selecting Add to swatches in the menu.

Let us know if this helps,
Thanks,
Sameer K