Thumbnailing issue with PNG files

thumbnail for PNGs via thumb() doesnt work for me. with JPGs it does. has anyone a solution for this issue ?

Have you checkout out this issue thread? Don’t know if it applies to you … https://github.com/getkirby/panel/issues/482

thanks for the link. i doesn’t work for me neither. but i figured out that the Problem was in fact related tho my local OSX environment. On my remote server everything works fine. So ill figure it out…