A shipping plugin on a multivendor wordpress website is malfunctioning and is not working properly.
It is a shipping plugin and these are the issues with it.
1) The plugin setting page does not open
2) The plugin works under the woocommerce shipping tab and the API is connected succesfully
3) does not calculate shipping on the checkout due to an error
4) E_Error caused in Line 766 of the plugin (screenshot attached)
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