Step 1 : Log on to your shopify account.
Step 2 : Go to your dashboard
Step 3 : Copy the URL you see
Step 4 : Delete unimportant stuff from the URL
Wrong: https://securecod2.myshopify.com/admin
Correct: securecod2.myshopify.com
Step 5 : Go back to Login page (app.miiut.com)
Step 6 : Enter your URL like this
Step 7 : Click LOGIN