I can’t install the plug-in, this message appears: Plug-in could not be activated because it triggered a fatal error

Customer:

I can’t install the plug-in, this message appears:
Plug-in could not be activated because it triggered a fatal error.
Fatal error: Cannot redeclare class USPS_WooCommerce_Shipping in /home/content/klm132465500_demo02/07/012303/html/wp-content/plugins/usps-woocommerce-shipping/usps-woocommerce-shipping.php on line 23

I hope you can help me with this.

Support:

Please delete the basic version of the plugin and then try installing the new version.