Hello All
facing this issue
The Theme you’re looking for couldn’t be found
Check the web address and try again, or try navigating to the Theme Editor from Theme.
regards
lalit
Always make backups before changing things.
If you recently edited your theme or added an app that changes theme files.
Then either undo that change, or publish a theme backup if you made one.
If you have no backup, first test a new theme install from one of shopifys free themes that the online-store channel is working correctly as a baseline.
https://help.shopify.com/en/manual/online-store/themes/adding-themes
If you did not edit any theme code or setting then
check the stores status https://www.shopifystatus.com/
And contact shopify support directly https://help.shopify.com/en/support/login