Spinning wheel during store access for German users, after Storefront upgrade from 2402 to 2402 CU1

Issue: After upgrading Storefront from 2402 to 2402 CU1, German language users may experience a spinning wheel during store access. This does not apply when upgrading from earlier versions of StoreFront, such as from 2203 to 2402 CU1. Symptoms or Error: The developer tool shows Http 404 error for...