WWW Image Loading Fails When Directory Contains "+" Character

I'm having a strange issue with loading images from files using WWW. Depending on the specific folder I load the images from, either everyt$$anonymous$$ng works, or all the images in the folder fail to load. If I move images from a folder where t$$anonymous$$ngs don't work to one where t$$anonymous$$ngs do, those images also load fine. Here is my code:

       private IEnumerator ImageLoadCoroutine(int i)
       {
             GameObject imgObj;
             WWW www = new WWW(fileList[i]);
 
             w$$anonymous$$le (!www.isDone)
                 yield return null;

             print("Loading Image: " + www.text);
             imgObj = Instantiate(imagePrefab);
             imgObj.transform.SetParent(imageContainer.transform);
             imgObj.transform.localPosition = Vector3.zero;
             imgObj.transform.localRotation = Quaternion.identity;
             imgObj.transform.localScale = Vector3.one;
             imgObj.GetComponent<RawImage>().texture = www.texture;
             imgObj.GetComponent<RawImage>().enabled = false;
             imgObj.GetComponent<BoxCollider>().enabled = false;
             imagesLoaded++;
             imageList[i] = imgObj;
     }

Any clues as to what might be going wrong? Thanks!