QuickBooks Error C=387 can also be caused due to template issues of invoices. This QB error can be solved by following the troubleshooting steps mentioned in this blog post. So, let’s get started. However, if you feel the need of any technical assistance, then give us a call right away and we will be there to help you out. Contact us via our toll-free number i.e. 1-844-521-0490 and our experts will be happy to help you.