For correct opening and operation of some templates, installation of libraries in the Sketch may be required. You can find the library files in the library folder, it is in the same directory as the main sketch file. To add libraries, follow these steps:
Step 1
Open Sketch, and in go to Sketch / Preferences / Libraries or press ?,
Step 2
Press Add Library… button and select all libraries files in the library folder
All libraries are installed and ready to go.