addon crashes upon reopening

Hi everyone,

I am creating an addon for watching pbs newshour. The addon goes to http://www.pbs.org/newshour/videos/, scrapes this site and creates a list of the full episodes.

The addon works relatively well when I first open it (the links work but it’s pretty slow). The addon crashes when I reopen it though. It seems that the addon is not going to http://www.pbs.org/newshour/videos/ when reopened. Anyone know why this might be? I’m guessing this is a simple answer, but I’ve found it in past forum posts.

I’ve posted my addon’s code and a log with the error on my github – https://github.com/dvatterott/Kodi_addons/tree/master

Thanks for the help,
Dan