Error 500 after install

[Andrea72]

After installing vbgallery3.01 successful, when I go to open the gallery I get a 500 internal server error.
My site is vbulletin 4.15, the provider is Italian Aruba and I have already 'installed PhotoPost Pro.
Can you help me find the problem?
Thank you.

[Andrea72]

I fix my problem, it was an folder permission error.

[Chuck S]

Yep that will do it. I was going to suggest also checking to make sure the config file as well. It would always come down to folder permissions or an invalid server path to your forum in the config file.