i m facing a problem when i search the youtube file for uploading on my youtube site ,then alert is show that invalid json string....
how to resolve this error
I was having the "invalid JSON string" issue and I tried every solution out there with absoutely no positive effect. I had managed to set up perfectly on my netbook and was trawling through all the files trying to find some difference, I even transplanted the installation from my netbook onto my desktop and still this JSON issue popped up on my desktop.
Finally I came to the 'my.cnf' file stored in /etc/ on my Fedora linux box. I found that opening that and deleting the contents meant that my youtube search and insert started working perfectly!
You may want to try deleteing /etc/my.cnf or erasing everything in it to leave an empty my.cnf. Hope that that helps!