Export to directory '&', file(s) '&' completed successfully

What causes this issue?

The creation of the documentation in HTML format was completed
successfully.

System Response

Three files have been created in the directory '&v1&':
&v2&_f&v3&
&v2&_i&v3&
&v2&_d&v3&

How to fix this error?

The '_f' file should be loaded from your web browser. It determines the
frame which arranges the '_i' file (index) left and the '_d' file
(actual documentation) right.

Error message extract from SAP system. Copyright SAP SE.