All Solidworks 2017 products on clients and server.

Add-in: SWPDFTaskAddIn - 2017040084

When a user initiates the workflow action containing the activity to create a PDF of a MS Office document (MS Word) via Task, the user gets this popup:

"Do you want to save changes you made to..."

This error popup appears on the users PC, or the PC that is executing the task.

After updating products to 2017, I updated the tasks as well. I've checked permissions for the group, at the workflow (states and transactions) - I don't see anything suspicious.

Looking at the log file:

[15.11.2017 13:30:42.169]Exception from HRESULT: 0x800A8029

[16.11.2017 09:00:43.488]Exception from HRESULT: 0x800ADF21

[16.11.2017 09:05:09.580]Exception from HRESULT: 0x800ADF21

[16.11.2017 09:09:06.250]Exception from HRESULT: 0x800A8029

[16.11.2017 09:10:38.979]Exception from HRESULT: 0x800A8029

[16.11.2017 09:17:54.210]Exception from HRESULT: 0x800A8029

[16.11.2017 09:28:13.639]Exception from HRESULT: 0x800A8029

[16.11.2017 09:49:54.570]Exception from HRESULT: 0x800A8029

[16.11.2017 11:41:34.063]Exception from HRESULT: 0x800A8029

Executes as my admin login.

The (2) PCs I selected in the Task also have the "Task Host Configuration" check boxes enabled (in the dock)

I've added the task permission for ALL users.

Any suggestions please?