I came across the same error. I solved it by copying my entire workspace into a new workbench, except for the writers. I then just re-created the writers and it worked.
In my case this probably happened because I had to convert back a 2018 workspace into a 2017 workspace.
Thanks for your answer. But I haven't turned on the 'Redirect to Data Inspector'. Any other ideas?
Hi @michaels,
One thing that might be worth checking is to see if 'Redirect to Data Inspector' is turned on. This is found by going to Writers --> Redirect to Data Inspector. If this is enabled, please disable it and try running again.