Issue
When generating a document with the "Generate Document" action that contains images in Nintex Workflow Cloud an error may occur.
Solution
All image variables that are being used in the Generate Document action need to be populated or this error will occur.
Additional Information
An example of how this can happen is if there is a process that has a start form which collects two signatures. A staff member and their manager may be required to sign to request a resource. If it is the manager that needs the resource then only one signature is required.
In this case only one signature image is being passed to the Generate Document action instead of two. For processes like this we suggest using some sort of conditional branching with separate Generate Document actions on each branch where one expects one image and the other expects two.
Error Code
The Error code will be similar to:
Cannot read property 'tf_A_GUID_Here_imageName_96N1uIlBy' of null [Error Code: IO.AsyncActionExecute.ErrorResponse]