Hi,
Well, that plugin was not developed by us. So the best would be to contact the developer of the plugin on:
www.softwarehtec.com/project/joomla-hika...dle-shipping-method/
I checked the code and I can see several things which could make the plugin not display shipping methods:
- if you didn't login or fill in the guest login form
- if your shipping address's country is not australia
- if your shipping address's post code is missing or not correct
- if the dimensions or weight of the products in the cart are not set
- the plugin is creating a "address_suburb" custom address field when you configure it. This field needs to be activated and filled in your shipping address as Sendle needs it to calculate the shipping fee
So please review these, and if you think it's all correct, I would recommend to contact Software HTec.
Regarding the error messages you get, it looks like it's because no rates are found that the errors happens. I would suggest to report these error messages back to Software HTec in any case so that they can fix them.