Problems just started happening with your store-front?
From time to time, Ecwid may change their back-end processes in such a way that it breaks your theme. I try to keep up to date with these changes and apply any modifications needed to Themes and Tweaks.
Any themes or Tweaks you have that are out of date, can be updated easily to pick up the latest changes. Here's how:
How to update your existing e-shop designer themes and tweaks.
If an update is available for any theme or tweak, and "update" link will appear for that Theme or Tweak on the "Manager" page in your e-shop designer account and in the Ecwid Control Panel Settings > Design > Theme Designer page if you are using the Ecwid Theme Designer App.
If you are using the Ecwid Theme designer App, click on the appropriate "update" link.
If you are not using the Ecwid Theme Designer App, in your e-shop designer account, go to the "Manager" page and click the "update" link for the theme or tweak, then copy the updated CSS into your Ecwid Control Panel Settings > Design > CSS Themes to replace your current active theme.
Note. the update may take some time (perhaps a minute or two) in some cases, please be patient.