After applying the Service Pack 1 (SP1) on top of CA PPM 15.4, IE11 might stop working on several scenarios.
The following error is being thrown in the Classic UI:
"The server was unable to parse the parameters on the URL or from a form. This may be caused by too many parameters on the URL or form - the maximum allowed is 10000. The request has been rejected."
Several actions might cause this error:
1. Restore Defaults on the Overview Page.
2. Admin -> Objects -> Project or Idea object -> Views -> Click on Fields Icon corresponding to any layout, and now Click on Return.
3. Add new attributes to an Object.
4. Saving Team's properties on a Project.
Another symptom that may occur is that users are unable to upload documents to project space in the Collaboration tab
This does not occur on every exact same scenario or on all Projects, but might be consistently encountered.
CA PPM 15.4 SP1.
Does not occur in CA PPM 15.4 base.
This error is caused by the Defect DE42037, after installing SP1 in 15.4.
This bug is fixed in 15.5 and expected to be patched in 188.8.131.52.
A workaround is to use a non IE browser, such as Firefox, Chrome or Edge in the meantime.