In QB, you are right the pick ticket and sales order are the same form and does not create an invoice, all templates found in a sales order are non posting

the invoice template selection also has a packing slip, but that does record the invoice when you use it.

templates can […]

Resolution for 'bills of lading issue: 'Picking tickets or bills of lading' available: Yes.

The bills of lading issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the bills of lading issue yourself by looking for a resolution described in the article. If it is a complex bills of lading issue or you are unable to solve the issue, you may contact us by clicking here or by using other bills of lading support options.

For more information about resolving issues related to bills of lading in Quickbooks/QBO or to get support for the issue 'Picking tickets or bills of lading', click the link below: