Hi every one, first of all, I apologized if I posted in the wrong section, since I don't know if my problem is omeka problem or imageMagick problem.
Anyway, if I uploaded an image, it created the image derivative as expected. But it cannot display the thumbnail, it said permission error (403):
You don't have permission to access /FolkloreArchives/files/original/71a00f74b13731d1c9520855fefa670d.jpg on this server.
So, our admin set the folder permission so public can read and execute in this folder. After that the thumbnail displayed.
But if you upload another image, this newly uploaded image, it will have the permission error again.
I would appreciate any ideas/clue where to look for since I have no clue at the moment. I cannot replicate the problem on my local, it only happen on the server.
Thank you so much for all your help.