I recently calibrated my display using DisplayCAL (version on Kubuntu 20.04. All went well but in the last step, installing the profile failed with the following error:

colord: gi.repository.GLib.Error: g-io-error-quark:
GDBus.Error:org.freedesktop.ColorManager.NotFound: profile id
'icc-fea7c015eb65d0ca9b8a89e0338246d325' does not exist (36)

While searching for a solution I found that quite a lot of people run into this issue. However it took a while to find a working solution: It turned out, all that was missing was the colord-kde package so after installing it via

sudo apt install colord-kde

the colour profile could be installed successfully.