We installed your plugin but we are not able to see any courier price on checkout
Do you have any restrict shipping settings enabled in the plugin?
If no, then it won’t affect ability for the couriers to display rates.
You can enable also debug mode and choose debug display as notices and then go through the notices displayed in the cart to see what methods are added or excluded when shipping packages are built.
there is also a js error
We need more information about the error. You can attach some screenshot of it, so we can better understand what it is. Shipping Packages does not do much JS, so the likelihood it is coming from it is fairly low.
Can you please help to understand first of all if work for what we need and in case I have a ups account, how I can define?
What shipping plugin are you using?
Majority of shipping plugins don’t support shipping packages and work against the cart.
If you want to display rates relevant a vendor then you might want to check our shipping plugins:
https://1teamsoftware.com/product-tag/shipping-label/
and if you want vendors to be able to print shipping labels then you can look at the following addon:
https://1teamsoftware.com/product/woocommerce-shipping-labels-for-wcfm-pro/
Thanks