I came across this one working with a customer recently, basically the following error comes up whenever you attempt to edit a project schedule in PWA and selecting a view that contains custom gantt chart formatting:
Error Message: View Failure: The view failed to load. Press OK to reload this view with the default settings….
In some cases users see the additional message of:
An error occurred while opening your project. Give us a few minutes and try again. …
While this error is quite generic as it can be caused by a number of things, this specifically only occurs when attempting to edit a project using the view in question, all other views work (view and edit) and these custom views definitely work when only viewing the project data.
For example modifying a view to use the following Gantt Chart with “Custom Duration 1” selected will result in this error:
Finally I have tested this issue on a number of Project Server versions and as far as I can see it exists on all Project Server 2013 SP1 and above – up to the latest Cumulative, as well as Project Online (at the time of writing).
However it does not affect Project Server 2010.
Sorry can’t help you here, other than to disable the customisations to the gantt chart! I’ll be logging this one with Microsoft and will update this post if anything comes of that.