Testing uploads:

This is the error thrown:
It was not possible to determine the dimensions of the image. Please verify that the URL you entered is correct.
The submitted avatar is 0 pixels wide and 0 pixels high. Avatars must be at least 20 pixels wide and 20 pixels high, but no larger than 150 pixels wide and 150 ...

The limitations:

Current image:
Maximum dimensions; width: 150 pixels, height: 150 pixels, file size: 9007199254740992.00 KiB.

The forum should be able to auto size the images. Nobody will be just editing an image just to upload an avatar.
Try to find an extension that does this automatically.

I tried. Error persist.

Also, I tried to upload a screenshot here and the only option is to link an image... No option to upload images on posts...

I tried with linking it, but it said something about the url too. (i was linking the avatar from other of my forum's profile)

Yes, you can upload it for me. But the problem would persist for other users as well.. Try to make it easier... I don't know much about phpBB.

Hello,
I was trying to upload my avatar, but I encounter errors saying about the image dimensions.
It's the same avatar I use everywhere... but phpbb is focused on the dimensions.