https://support.wati.io/l/en/article/ikyb3db1td-what-are-possible-common-errors-in-embedded-signup-flow

A. Errors in the creation of the business manager account.

🚨 An error occurred while processing this request. Please try again at a later time.

This is an unclear error that needs further assistance. The company account creation could have failed for several reasons.

==> If you have this error, please use an active Facebook account or contact support to resolve it.

🚨 You have reached the limit of the number of businesses you can create at this time.

There is a limit to the number of business accounts you can create.

==>Please use an existing business account or delete/close unused business accounts.

🚨 Your Facebook account is too new to create a business account. Please try again in one hour.

New Facebook accounts have to wait a while to create a business account.

==> Please use an existing and active Facebook account or wait a few hours before using your new account. The new Facebook account can be actively used during the waiting period.

🚨 We limit how often you can post, comment or do other things in a given time to help protect the community from spam. You can try again later.

Your Facebook account has been flagged for suspicious behavior.

==> You need to use an existing, active Facebook account with no previous problems.

🚨 You can no longer use Facebook products for advertising. You cannot run ads, manage advertising assets, or create new ad or business accounts.

You cannot create new Business Manager accounts due to previous suspicious behavior.

==> Use an existing, active Facebook account with no previous issues.

🚨 Your paid account is disabled.

Your payment account has been disabled due to previous suspicious behavior.

==> Contact Facebook for help here.

🚨 A user can only create one business account at a time.

You can only create a single company account in a given period of time.

==> Use an existing company account to join.

🚨 The name you have chosen for your company is not valid. Consider using xxx.

==> Please add a valid name that matches your business name..

B. WhatsApp Business account creation errors.

🚨 The user does not have permission to create WhatsApp Business accounts.

You do not have the required admin level permission to create WhatsApp accounts on the business account you have selected. ==> Get admin access to the business account to continue or select an account for which you have admin permissions.

🚨 You can only create a limited number of WhatsApp Business accounts before your business and WhatsApp account verification is complete. You can create additional accounts once you have been verified.

You have attempted to create multiple WhatsApp Business accounts under an unverified business.

==> You can only create additional WhatsApp Business accounts once verification of your business and WhatsApp account is complete. Start the business verification for the account by visiting the Business Manager..

🚨 We are unable to verify the Facebook business account you selected. Go back to the previous screen to select a different account, or go to Facebook Business Manager for help.

The selected Facebook Business account does not comply with our policies for using the WhatsApp Business API and could not be verified.

==> Visit your Business Manager account for more information about this Facebook Business account. If your business verification submission is rejected, you should have received an email notification with detailed reasons. You can try resubmitting your business verification if you believe this is an error or create a WhatsApp Business account using a Facebook Business account that has already been verified.

🚨 Something has gone wrong. You'll need to contact support and try again.

This could be an intermittent problem in WhatsApp.

==> You can retry the stream in a few minutes.

C. Phone configuration errors

🚨 This phone number already exists in your list of phone numbers.

You are trying to add a phone number that already exists in your WhatsApp Business account.

==> Re-enter the flow or restart the flow to select the existing phone number.

🚨 This number is registered to an existing WhatsApp account. To use this number, disconnect it from the existing account. Then return to this page and re-enter the number. Note: It may take up to 3 minutes for the number to become available.

The phone number was already registered on our platform (i.e. WhatsApp Messenger, WhatsApp Business App or WhatsApp Business API).

=>Unregister the number if you wish to use it, or register a new number.

🚨 Your verified name violates WhatsApp guidelines. Please edit your verified name and try again.

The name used for the phone number business profile does not meet our guidelines.

==> Please refer to the display name guidelines and try again.

🚨 Something has gone wrong. You will need to contact support and try again.

There was a problem creating the phone number business profile.

==> Re-enter the correct company profile name according to guidelines and other details.

D. Phone verification errors

🚨 Telephone number owner

==> This phone number has already been verified. You may try refreshing the page to see the change applied..

🚨 Your phone number does not appear to be valid. Please check it again, or try again after 5 minutes.

An incorrect phone number has been entered or we do not support numbers in this format.

==> Make sure the number is operational and verified by a telecommunications provider. Currently, we do not support Interactive Voice Response (IVR) numbers.

🚨 You've guessed too many times.

To block spam, the system only allows a limited number of verification attempts.

==> You have to wait about 12 hours before trying again. After this waiting period, go back to the flow and select existing accounts and phone numbers to verify again.

🚨 An error occurred while verifying this phone number. Please try again later.

There has been a problem with the verification code.

==>Please try again later.

🚨 You have requested your code too many times.