Extra info on this problem...

I had the same message - no xoopslogger.php.

I found that it was true, there is no xoopslogger.php in the latest XOOPS releases. There is a logger.php though, so I just changed the references in the module to logger.php. That got rid of the error message at least. The module I was using is outdated and not XOOPS 2.x compliant, I´m trying to convert it. So there wouldn't be many people encountering this error, I´d say.