UNLIMITED PRO issue undefined variable plugin_public

Dear @xootix
i bought the unlimited pro version of side cart,
and it gives me this message when i activate the plugin:

Notice: Undefined variable: plugin_public in C:\xampp\htdocs\test\wp-content\plugins\woocommerce-side-cart-premium\includes\class-xoo-wsc.php on line 169

Warning: call_user_func_array() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in C:\xampp\htdocs\test\wp-includes\class-wp-hook.php on line 287

because of that, I debugged
and then it says this message in the top of WordPress;

https://media.publit.io/file/eea03c41-a744-4a02-9869-796373412639.jpg

i have the last version of woocommerce, PHP and the theme, also I uninstalled the free version of side car

so, what should I do?