The user is unable to upload invoices to a fixed price company due to the error code:
Fixed Price Company activation incomplete
Fixed price companies integrated with an accounting package need to be fully activated (and associated payments up to date) to add these items.
If you do not have access to activate the company, please contact the billing account admin (or another user with the 'Activate' permission).
Fixed Price Subscription users
This error is thrown when a company has not yet been activated on a Fixed Price Subscription.
To clear this error message, you will need to activate the company on the Fixed Price Subscription before you start uploading documents.
To learn how to do this, please click here.