Created attachment 1982816 [details]
status code 504

Description of problem:

In the migration details page, at first the migration details are displayed without any issues. However, after sometime, the details disappear, and an error is printed:

Version-Release number of selected component (if applicable):
(GCP) / OCP 3.11 -> OCP 4.14
MTC 1.7.12

How reproducible:
Always

Steps to Reproduce:
1. Create a migration plan
2. Execute the migration and wait for it to successfully finish
3. Navigate to the migration details page
4. wait for some time

Actual results:

at first the details of the migration can be observed, but after a while, the details disappear, and replaced with a 504 status code error


Expected results:

regardless of how much time passed, the details should always be printed


Additional info: 

API response:

{
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {},
s "status": "Failure",
  "message": "migplans.migration.openshift.io \"test-rlbk\" is forbidden: User \"system:anonymous\" cannot get resource \"migplans\" in API group \"migration.openshift.io\" in the namespace \"openshift-migration\"",
  "reason": "Forbidden",
  "details": {
    "name": "test-rlbk",
    "group": "migration.openshift.io",
    "kind": "migplans"
  },
  "code": 403
}