Hi Alejandro,
you should check the permission of the iView. And in parallel you should check the configuration of security zones for the components. If you open the sap.com area -> NetWeaver KMC -> High safety ->com-sap.km.cm -> Components -> crawlerindexmonitor. Here is defined what roles/groups/user are allowed to open the iview (End User Flag checked)
I hope this helps,
Anja