Unlink() not supported for read-only stream wrappers

Hi there

I haven't come across this issue before, wondering if it is to do with the new admin / Grav beta version. I am running grav beta 1.5.0 beta-2.

Basically if I try and remove a media file (image) via Admin browser from the page media field I get this message and the image remains on the page...

unlink() not supported for read-only stream wrappers

any clues much appreciated...

Permission issue most probably

https://stackoverflow.com/questions/19026809/php-unlink-not-working
Hope you find your answer in here ;) !

Good luck