Common error messages
What each error message means and how to fix it.
Account and sign-in
- “The email or password you entered is incorrect. Please try again.”: check your email and password, or use “Forgot your password?”. If you created your account with Google, sign in with “Continue with Google”. Mobincube classic accounts do not work here: create a new account.
- “Invalid code” / “Invalid or expired code”: the code is not correct or has expired. Check it or request a new one with “resend code”.
- “Password must be at least 6 characters”: choose a longer password.
- “Passwords do not match”: the password and its confirmation are not the same.
Balance and plans
- “Insufficient balance”: you do not have balance to send the prompt. Buy tokens or subscribe.
- “Negative balance”: add funds before publishing or generating a preview.
- “Subscription required”: to generate a release build or publish you need at least the Bronze plan.
- “Upgrade required”: to download the source code you need the Silver or Gold plan, or $25 of balance.
- “Requires active subscription” (Opus model): Opus is only available with a paid plan.
Build and generation
- “Build failed” / “Source code errors detected”: click “Fix with AI” (uses tokens). If it keeps failing, describe the problem in the chat or contact support.
- “Pre-build checks failed”: click “Fix with AI”.
- “Build error” (web preview): the web app does not build after a change. Click “Fix with AI”.
- “Generation was interrupted” / “Your last generation was interrupted”: nothing is lost. Click “Retry generation” or “Continue generation”.
- “Service temporarily under maintenance”: the AI chat is under maintenance. Wait; it will be back as soon as possible.
Payments
- “Card expired”: delete the card and add a new one.
- “You need a payment method on file to make a purchase.”: add a card.
- “A billing address is required for invoicing.”: complete your billing address.
Files and domains
- “File type mismatch”: you can only replace a file with another of the same type.
- “Please select a valid image file (PNG, JPEG, or WebP).”: the icon must be PNG, JPEG or WebP.
- “The domain you entered is not valid.”: the domain must look like example.com.
- “That domain is already in use.”: choose another domain.
- “We don't support that extension yet”: buy it from another registrar and add it as an external domain.
- “The file could not be sent. Please try again.” (support): try again; the limit is 25 MB per file.