Using WordPress 4.1.9 with Simple Share Buttons Adder 6.1.4
The SSBA on default site in multisite instalation worked fine.
On the other site it failed to display the configuration page, showing a bunch of php errors regarding the ssba_admin_panel.php starting from line 990, where the plugin checks for options, but options failed to load in 984 since there were none in wp_[x]_options table (where [x] is the site id)
I just copied option_value for option_name = ‘ssba_buttons’ from wp_options (the default site) and inserted the key value pair into wp_[x]_options table.
now it works like a charm.