We're sorry, but something went wrong on RoR

I'm facing a problem with my rails app on the production environment, the situation is that I have a embed code for displaying the video which is further having two links for the quality selection of video, i.e 360p and 720p. The default quality is 720p. A user can select a quality depending on the bandwidth. Now the problem is that the 720p works file but 360p show the error message, "We're sorry, but something went wrong. If you are the application owner check the logs for more information."

Below is the log file generated when I look for heroku log in the terminal:

http://ift.tt/1ElZJ1T

Please check the link and do help, if you have any idea what's wrong here.

Thanks.