There is a typo in one of the updater scripts that causes an update from rConfig 3.9.2 to 3.9.5 to fail without any errors.
There is an extra semicolon in 'rconfig/www/lib/ajaxHandlers/ajaxInstallUpdate.php'. on line 107 that causes PHP to error. This can be found in rConfig 3.9.2 and 3.9.3.
Login to your rConfig server console and run the following command.
! Please verify this is a 3.9.2 or 3.9.3 installation before running the commands.
cp /home/rconfig/www/lib/ajaxHandlers/ajaxInstallUpdate.php /home/rconfig/www/lib/ajaxHandlers/ajaxInstallUpdate.php.bak sed -i '107d' /home/rconfig/www/lib/ajaxHandlers/ajaxInstallUpdate.php
These commands will create a backup of the file, and then remove the line with the semicolon.
The update should work now. Please go to rConfig.com and get the latest rconfig-3.9.5.zip file. Make sure the name of the file is rconfig-3.9.5.zip before uploading it, and then run the update, following the instructions from the rConfig main Dashboard. You should see the following output.