[Report-Generate.php "file Not Found" 500 Internal Server Error, No Info In Logs]

I kept digging and finally found this post, which solved the problem:

 

https://github.com/revive-adserver/revive-adserver/issues/185

 

Specifically, I needed to install php-mbstring and then the reporting began to work.

[Report-Generate.php "file Not Found" 500 Internal Server Error, No Info In Logs]

When attempting to generate any of the reports in the standard or admin reports, I receive a 500 internal server error.  I've checked apache logs and the debug.log and have found nothing.  I tried opening up permissions to 777 and that did not have an impact.  What else might be causing this problem?

 

Here is a sample URL:

 

http://myadserver.com/www/admin/report-generate.php?period_preset=last_month&period_start=01+June+2015&period_end=30+June+2015&campaign=29&sheets[daily_breakdown]=1&sheets[ad_breakdown]=1&sheets[zone_breakdown]=1&plugin=reports%3AoxReportsStandard%3AcampaignAnalysisReport

 

I would really appreciate any ideas you could throw my way.  Thanks for your help!