When logging in with non admin user getting an Unable to render topology error but the same is working fine with an Admin user login
Please ensure that Chassis Manager is enabled for the non Administrator users as if there are devices with Chassis present Spectrum will not be able to render the topology.
In OneClick client go to users tab, Select non admin user
In contents panel click on Access
In Component Detail under Privileges tab, Click on Add/Remove Privileges
Expand Explorer Views, Enable Chassis Manager
Click on ok
Now open OneClick console with the non-admin user and verify that the topology renders successfully.