Hi,
Once a cart is converted into an order the cart is not available. So that is normal.
The fact that you can't pay for an order can come from 2 things.
Please check:
- that the setting "Payment of orders not paid immediately" of the HikaShop configuration is active. Otherwise, payment of orders won't be possible outside of the checkout via the orders listing.
- that the status of the order is enabled under the "unpaid" column of the menu System>Order statuses. Otherwise, the payment button won't display for the order.
The icons not displaying properly on the control panel comes from the fact that you have customized the frontend CSS of HikaShop under the Display tab of the HikaShop configuration.
So you didn't get the new CSS for the display of that area. If you switch back to "default" there, you'll get them to display normally.
You can then reapply your changes to the frontend CSS new version, or add your CSS to the styles CSS as to avoid future issues with missing CSS after an update.