Sync Error after moving plugin to new site

Hi, I have been using your plugin for a while and really love it. Last year we developed a new website and moved the plugin over, but since then we have a sync error. The plugin doesn’t show new products we have added and doesn’t update prices along with changes we make.

https://www.medipro.co.uk

Unfortunately, I was only brought in last year to develop the new site and was given the plugin zip file and assured we were using the premium version.

Thanks in advance for your help,
Paul.