Hello,
1) Contact your hosting provider and ask to check the permissions because seems customizer request is locked http://prntscr.com/p8lmss and you don’t have access to Theme Options.
2) Even before theme update we did not have the option to change the sidebar in each category. Product categories inherit the shop sidebar (Appearance > Widgets > Shop sidebar). You can only change the position of the category sidebar and shop page sidebar (Theme Options > WooCommerce > Shop > Product page layout) http://prntscr.com/p8lu8n
Regards