On the new responsive design, we started getting the error Unable to Save - Object reference not set to an instance of an object since last friday ( 09 December 2022).
We tried creating a new task list for the new workflow and the error is resolved.
However. we have many workflows already running which are using the “Workflow Tasks” list and it seems that the existing tasks too started failing upon submission with same error.
What is the root cause of the error and what can be done to fix the existing inprogress workflows?
Referring to this thread
The suggestion is to
Hope that helps
Thank you for the reply.
I am aware of this solution. But this is not helping me.
I have many workflows currently inprogress and users are unable to approve and submit the task form.
Also, what is the root cause of this issue?
How many items are in your Workflow Task?
Has it exceeded the List View Threshold limit of 5000 items in SharePoint Online?
There is also the possibility of the List being corrupted.
workflow task list has around 3500 items.
what do you mean by List being corrupted? How do we know if it is corrupted or how to fix it?
Its better if you log this issue with Nintex Support (I’m sure you have already done so) and get their advice or suggestion on how to proceed.