Looking at your error message, it confirms that there is no configuration error.
You will need to apply some patches corresponding to your exact Netweaver SP version.
Most probably there will be an SCA file patch you will have to download and run the upgrade.
Manish has mentioned the exact SAP Note for it.
Select the correct SP version in the note and you will be able to download the patch you need to run.
Collaborate with your Basis team for this.
Also, make sure you follow this link and assign corresponding roles to the user who wants to view the BPM Dashboard.
All the best and do let us know if it solves your problem.