Most likely it is either a permissions error or an error with a corrupted .htaccess file..

Interference with an .htaccess file

If you have implemented .htaccess on your site, it may be interfering with the web page you are trying to load into your browser. Please double check the .htaccess configurations to ensure that it doesn’t contain any errors.
To confirm whether a misconfiguration .htaccess is the cause of the 500 Internal Server error, either remove or rename the .htaccess file temporarily and then try to reload the page.
Using your FTP software delete EVERYTHING in your bmz_cache folder and rename the .htaccess file (remove theleading "." and rename it to something like htaccess.txt)

Check your folder permissions for the bmz_cache folder.
Check the permissions of the folders/files IH3 generates within the bmz_cache folder. If there are permissions error you may have to work with your hosting company. (See recent posts here on this matter)

Quote Originally Posted by AshleyNG2 View Post
Hi guys

I'm experiencing a 500 internal error with my site caused by this module. Products prior to this module are working correctly.

Also my admin/image_handler.php page is blank (500 internal error page). I have gone through the readme again and usage instructions and can't spot anything I've done wrong. Have reuploaded this file and its still the same, I'm guessing my problems are stemming from this.

Any ideas??

Working Link: hawaiian-shirts.co.uk/hawaiian-shirts/blue-surfing-in-hawaii
Error page: hawaiian-shirts.co.uk/hawaiian-shirts/ <-- doesn't work as it includes new products which have error.

This also caused a 500 error on the front page as it displayed new products, I've had to remove that for the meantime.

Thanks.

EDIT: Btw, no error logs in /cache or cpanel error logs and my /bmz_cache contains files/folders