Roll back to an older version of your theme
If you've changed theme files and need to revert them, you can roll back
.liquid files individually to a time and date before you made the changes.
Under the Templates header, click into one of the .liquid files you have edited recently.
Click Older versions next to the
Click the drop-down menu to select an older version. Clicking a datestamp will roll the code back to that saved version.
(optional) Click Preview and see if the error was fixed.