There are a number of reasons beyond xtraWine's control that may make it difficult to complete an order. There could be an operating system conflict, an out of date browser, the wrong security and operational settings for the browser, etc. Usually you just need to quit and re-load the browser (better still, switch your device off and on again) by pressing CTRL + F5 at the same time. Cached data is deleted and the standard access conditions are reset. If this doesn't work, you should contact your technician to investigate the problem with your device.