If Shopware is only in maintenance mode, a login with the apps is possible without any problems. If the server is secured by password request (HTTP Auth) during test operation, the following URLs must be excluded from this:
The first URL is already protected by Shopware itself with a login and is used for the communication of the apps with the Shopware POS or Shopware WMS plugin. The second URL must be excluded from authentication so that the images of the items can be displayed in the apps.
To exclude the URLs mentioned from the password query, please contact your agency or your hoster directly so that they can make the changes.