Select the Creative Cloud icon in the Windows taskbar or the macOS menu bar to open the Creative Cloud desktop app.
Last updated on
Oct 14, 2026
Fix Creative Cloud serial number errors by checking your subscription, account settings, language, and system clock.
A connection or setup issue may trigger the serial number error. Follow these solutions sequentially until you can sign in again.
Your subscription isn't active
Follow these steps to verify that your Creative Cloud subscription is active and associated with the correct account. If your subscription has expired or is inactive, learn how to reactivate your Creative Cloud subscription.
Select the Account icon in the upper-right corner, then select Sign out.
Sign in to the Creative Cloud desktop app.
If you aren’t using the latest version of the Creative Cloud desktop app, a prompt to update appears. Select Update to install the latest version of the app.
Your Billing and payment information are incorrect
Ensure that your payment details are accurate and up to date.
Sign in to your Adobe account.
In the Plans and payment tab, select Plans.
Select Edit billing and payment, and then choose Change payment.
Select Add new to add a payment method, or choose Edit to update an existing one.
Confirm that your payment details, billing address, and phone number are correct. If the details are incorrect, update your billing details with the correct information.
Note
If you have a corporate card, always use the cardholder's name and billing address, not your own. Check with the cardholder or your accounting department to verify the correct name and billing address.
Your default install language doesn't match your plan
If you purchased an English-only subscription, make sure the default language setting in the Creative Cloud desktop app is set to English (International).
Select the Creative Cloud icon in the Windows taskbar or the macOS menu bar to open the Creative Cloud desktop app.
Select the Account icon in the upper-right corner, then Preferences.
Select Language in the left panel.
Under Default install language , select English (International) from the dropdown menu and then choose Done to apply the settings.
You have successfully changed the default install language of your Creative Cloud apps.
Your system clock is out of sync
An inaccurate computer system clock can cause activation issues. Ensure that your computer's system clock is set to the correct date and time:
