Just an update for anyone experiencing this problem: My two colleagues who were having this trouble solved it by updating their Chrome browser. Just switching to other browsers didn't solve the problem, which is confusing, but I'm not going to argue with results!

Thanks, I'll give that a try! The action that triggers the error message is clicking on literally ANY project and trying to view the tasks. 

My two team members are still experiencing this issue. Workfront support says they can't replicate the problem. I'm going on vacation starting tomorrow, so my boss (who is one of the people experiencing the issue) is currently unable to cover my work until she gets access back. It's incredibly frust...

Not the OP, but also having this problem: my team members are using Chrome and getting the error. When they tried Firefox, it was completely unable to load the Workfront instance.

This has just started happening with two of my team members. One has admin access and one has work access. Clearing the cache has NOT helped. I had one of them open a support ticket with Workfront but that was a few days ago and we've had no response.

Did this ever go anywhere? I'm trying to set up a magazine production schedule in Workfront. Each story is its own project, but I'd like to have an overall project that indicates what percent each story project is at. Our editor didn't like having 600+ tasks per issue, so I tried to solve that probl...