I’ll post the answer to my problem, which I got thanks to the links provided by Jesse. What I did was to delete the index.html and .touch files form the cache folder where the tinthumb.php file is located. After that it all worked perfectly!
I’ll post the answer to my problem, which I got thanks to the links provided by Jesse. What I did was to delete the index.html and .touch files form the cache folder where the tinthumb.php file is located. After that it all worked perfectly!