A TimThumb error has occured

The following error(s) occured:

The image being resized is not a valid gif, jpg or png.

Query String : src=../images/urunler/S02-4-22W-Starter--TL-18W-Floresan-ampul-icin---S2-4-22W-SER-220-240V-BL-LIS-12X25CT--resim-6392.webp&w=500&h=500&zc=
TimThumb version : 2.8.14