"Unable to read file contents."

Hi, I was using this module for a long time, then my server updated and it stopped working saying "Unable to read file contents.". I tried playing with the permissions but it was not it, I am able to open and echo the same file, only your function returns an error, the files haven't changed and all 6 now can't be displayed.

I tried to investigate but I have 0 clue, since technically my environment didn't change, I haven't updated your module. I know there must be something wrong on my side, but what? and how to know what it is? The permissions are 777 for now, the file is in the same folder, code haven't changed, and "echo file_get_contents" works just fine.

Thank you, rt-2