Configure the folder relative to the basedir that contains the failed imports:
<mc
...
<adminInterface>
<folders>
<folder id="failedimports" name="Failed imports">
<url>/opt/mcs/fromFSS/ImportFailed</url>
</folder>
...
</folders>
...
</adminInterface>
</mc>
If this value is configured, the failed imports page will look as follows.
