Am also getting the same problem while installing.
Refer the following passage:
I think u are using dedicated hosting right.
The problem is some of the php modules like MySQLi, GD, mbstring modules isn't installed on your server.
Check the above modules are installed on your server before installing the osclass script.
I searched all over the forums, the same issue got most of the user saying isn't installed osclass( Getting blank page , file permissions).
And one more thing to say, the downloaded osclass don't upload directly, because the extracted folders and files haven't correct permission in cPanel(all those folders and files have same permission 755), as osclass say files are 644 and folders are 755 .
Download the osclass from osclass.org and extract in desktop using some zip extractor like winrar, winzip or something like that. And then compress the extracted folders and files using the same. And then upload and extract to your directory. Now the folder and file permission are correctly configured without modifying anything.
Please admin, post the requirements and instructions of osclass in DOCS of install including submodues of php like GD,Mbstring, MySQLi extension.
I think the shared hosting(most of the modules installed itself on the server), they are not having this problem like this.
Some of the users having dedicated hosting, and some of them(like me) ,they aren't installed such modules and directly installing this script, getting blank page error, file permissions and so on.
I hope this is helpful to u.
Thanks & Regards,
chintor