You do not have a valid asset view

What causes this issue?

You have not defined an asset view and want to look at assets using
Reporting.
The asset view represents the authorization for various asset fields as
well as for individual depreciation areas, and is therefore absolutely
necessary for further processing.

System Response

Further processing will be cancelled.

How to fix this error?

Define your asset view:
a) using the master data processing in the menu bar 'Settings'
b) using the value display in the menu bar 'Process'
c) permanently in your user master record (parameter)

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.