issue on module prestashop 1.7.6.5

Good evening, i have an issue on module presta shop 1.7.6.5 i tried to install the module but it appears a message that warning me that is not possible ovveride the method getorderTotal on class Cart because it is just done from other module an_productsfields version 2.4.5. After the support of developer that has created this module it is installed but don't work correctly in particular in back office it appears a message on console : JQuery is not defined in some files. The module is Seat Reservation buyed on evantomarket. Finally i need to fix this bugs because the developer has difficulty to fix it in rapid way. Now we were able to show the module in the module tab of our product, but we have also the same issue. we notice that jquey bug is fixed, thansk. Now we have another bug during order processing: We copied controllers folder in override folde of module to PrestaShop /override folder, as suggested in documentation, but when we order a product with seat reservation we find no reservation in order. when we click on button to proceed with the order, we have seat reservation (img Cattura01) On order confirmation, seat reservation disappears (img Cattura02) and we can't find seat reservation in order admin panel (img Cattura03) We noticed that table ps_scpsasrm_order is never filled: we tried to fill it manually and we noticed that: - in page product detail, seat is correctly booked but when we try toi order produc with another seat reservation, on shopping we find both actual and previous booked seat reservation. - on order confirmation, we have no seat reservation I look forward to receive a rapid support as soon as possible on this issue in order to complete the installation for my customer. thanks in advance. Kind regards, netcom