Wrong approve / reject page is shown in Nintex

In some cas­es you are pre­sent­ed the wrong page when try­ing to approve a task that was cre­at­ed by a Nin­tex work­flow. The one you see is the orig­i­nal Share­Point page. While instead you should see the one with the option “Approve” and “Reject”

The prob­lem here seems to be a mis­match in the con­nec­tion between the task­form and a con­tent­type.

There is solu­tion to this prob­lem. You need to set the right task­form to be shown with the Nin­tex­Work­flow­Task con­tent type.
Use the nwad­min com­mand line tool with the Set­Task­Form oper­a­tion

NWAdmin.exe -o SetTaskForm -siteUrl teamsiteurl -contentType contenttypename
  -taskformUrl taskformurl [-formType Edit|View|All] [-updatechildren Yes|No]

For exam­ple:
NWAdmin.exe -o SetTaskForm -siteUrl "http://portal/mynintexsite"
   -contentType "Nintex Workflow Task" -taskformUrl
   "_layouts/nintexworkflow/ApproveReject.aspx" -updatechildren Yes

Tip! This option also gives you the pos­si­bil­i­ty to attach a cus­tom approval page.

Note that when you installed Nin­tex Work­flow 2007 in a dif­fer­ent lan­guage you may need to trans­late the name of the con­tent­type.