Dashboards are not Accessible on Runtime.

I am using ThingWorx Platform Release 9.1 and DatecodeSP1 Users or Developers are not able to see the mashup Runtime, even though they are in the "Administrators" group. Sometimes, after restarting the laptop or incognito Runtime shows up, but most of the time, the dashboards won't come up. We tried in different ways:

1. Different Browsers

2. Restarted Laptops

3. Incognito Windows

4. Restarted the Thingworx with clearing cache When the Runtime Dashboard is opened, we get HTTP Status 403 – Forbidden Here are the errors that I faced HTTP Status 403 – Forbidden