I try to the install the CKeditor plugin by using GPM as described here (because CKeditor is not listed via the admin/plugin interface): https://learn.getgrav.org/16/cli-console/grav-cli-gpm
I have copied the CKeditor files in a CKeditor directory created under the user/plugins directory, as recommended.
Then I go to the bin directory of Grav and type “gpm install ckeditor” , but then I get an error message saying:
"gpm is not recognized as an internal command, an executable program, or a command file".
I have checked that gpm is present into the bin directory.
What can I do ? is there another way to install the CKeditor plugin ?