uggla,
To solve your "copy file: /usr/etc/wbar.d/wbar.cfg" error and to get wbar to work, remove the following files for previous Tiny Core Linus installation:
/home/tc/.wbar
/home/tc/.wbarconf
I had this problem and after removing the files above, my wbar now works. Tiny Core Linux 5.x uses tc-wbarconf, not the .wbar and .wbarconf used in 4.x.