How to create script buttons in the bottom pane?

 From:  artyomlekos (ARYOMLEKOS)
9623.3 In reply to 9623.2 
Did everything as per instructions:
1) replaced the CommandBar.htm file in the ui folder
2) extracted customui folder to ui folder

I run the program, an error appears.

After clicking ok, the program starts, but the buttons do not appear.
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