Moodle 2.4
I was trying to correct the appearance of a quiz so I deleted a small sound file and tried to upload it again. While uploading in file picker I received 'Invalid JSON string'. Any solutions?
Your problem might be solved in a number of ways, and maybe others will jump in with advice.
I am not an expert at these issues, but you might want to first make sure that your server had json support enabled. Below is an example of what I see about json on my own server.
Same problem. There is a "invalid json string" when i'm trying to upload youtube URL. JSON enabled, moodle 2.4
I found that error appears only when i'm trying insert direct URL. When i search by keywords it's ok.