Hi, if a project has been set in your company and that customer / invoice included in the configuration, then Project-Task field needs to be provided. If not, then you can check "Project accounting preferences"  <ScreenId=PM101000> in the UI to see what's the non-project code.   When you create a project-related document, you must specify a project task for each document line. If you have specified one of the project’s tasks as the default one for the project, the system will automatically insert this project task in the lines of documents when you select the project. ... View more

Solution update. I discovered that a plugin that was installed in my Chrome browser was causing the issue. I uninstalled and all works well now. ... View more

Solution update. I discovered that a plugin that was installed in my Chrome browser was causing the issue. I uninstalled it and all works well now. ... View more

Hi, this company might be missing the Project Accounting Licence / Rights for that user, so we'd recommend contacting your Partner Service from your country to get this licence and module enabled for the company and your API user.     ... View more