Deleted the background

As soon as I installed the plugin, it deleted my background and turned it to the default, leaving this message:

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in /home/content/92/8776992/html/brezzaarch/wp-content/plugins/jetpack/jetpack.php on line 1611

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Custom_Background::bbg_add_settings_link’ was given in /home/content/92/8776992/html/brezzaarch/wp-includes/plugin.php on line 173
,

Does any body know what it is

Thanks
HB

https://www.ads-software.com/extend/plugins/better-backgrounds/