Exactly showing “internal server error” at the moment I have disabled that plugin. website: buyacsgo.com
Gotcha. The best thing to do here is what is called Conflict Troubleshooting – what is most likely going on is the PayPal Checkout plugin is conflicting with something else. To troubleshoot it do the following:
The best way to determine if the issue is being caused by a theme and/or plugin is to do the following:
1. Temporarily switch your theme back to the Storefront or Twenty Seventeen Theme.
2. Disable all plugins except for WooCommerce and PayPal Checkout.
3. Test to see if the issue has been resolved.
If that resolves the issue, then one-by-one you can switch back your theme and re-enable your plugins, testing in between, until you find the one causing the conflict. After that you can either reach out here for further assistance or reach out to the plugin developer or theme developer of the conflicting item.
You can read more about plugin and theme conflicts here: ?https://docs.woocommerce.com/document/woocommerce-self-service-guide/
Let us know how it goes!