Importing icons from icomoon.io: error

[Marianna Che]

I'm trying to upload new icons from icomoon.io but receive a mistake: 

"Couldn't add the font. The script returned the following error: selection.json or SVG file not found. Was not able to create the necessary config files"

Please, help me to solve this problem! 

[Keyamoon]

I assume you you're using a third-party script or perhaps a wp plugin to import packages generated by IcoMoon. You should try and contact the developer(s) who make such tools.