Parameters I_STYLE_VARIANT and I_STYLE_LANGUAGE are not specified

What causes this issue?

One of the parameters I_STYLE_VARIANT and I_STYLE_LANGUAGE has to be
specified.

System Response

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

How to fix this error?

Specify the parameter I_STYLE_LANGUAGE and leave the parameter
I_STYLE_VARIANT empty if you want a variant that is assigned to the
specified language to be returned.
If the parameter I_STYLE_VARIANT is filled, the variant specified (if
it exists) is returned.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.