Hi,
The backend access you provided doesn't allow us to check your HikaShop configuration, your custom fields nor views. So I couldn't check many of the most important settings of your shop.
You also do not mention what doesn't work in your checkout. I went through it without any error and I was able to create an order successfully. So, without any error displayed, and without you telling us what the problem is, and without being able to check your settings, it's hard to say anything useful.
One thing I found strange is that you changed the type of the "country" address field to be a text input field. This is a problem.
Payment gateways usually require the website to provide the address of the customer. And they usually require the information to be provided in a specific format. For example, the country usually needs to be provided as an ISO code number, or a 2 letter code. For this to happen, HikaShop (and sometimes payment plugins too) has a conversion table so that based on the selected country, the corresponding code is sent. If you change the country field to a text input field, the payment plugins won't be able to send the corresponding code to the payment gateway, which will likely refuse the payment.
So I would highly recommend reverting this change and use the "zone" type for the country.
Also, note that for existing addresses, you'll have to edit them to select the correct country and save them so that the change it taken into account.