How to resolve unexpected end of input in file picker moodle

Hi Iam using moodle cms to develop my e-learning website everything OK except one problem when i trying to search any youtube video the first image error shown in mozila firefox second in google crome. [![mozila file][1]][1] [![cro][2]][2] [1]: https://i.sstatic.net/L6g5H.png [2]: https://i.sstatic.net/b0AN6.png in browse repository enter search keyword when i click ok then this error appear anyone plese help how to resolve.you can find this option in add an activity then page.