Our hosting provider had an issue on Aug 18, 2023 and got our server deleted where all of your data was stored (Your theme, customisations, upsells, settings, translations are all safely recovered.). As a result of that, you won't be able to login to your account using old credentials.
You have to go through the setup process again. (Your API credentials are not backed-up for security reasons and that is why you have to enter those again.)
Click here to watch the loom video with instructions on how to set it up.
How to setup a Private App?
Since Shopify has removed our apps from the app store, we have built the integration to keep
our apps alive with all the same functionalities so you can use our apps as you were. It
requires a few additional steps on your side to set it up.