Someone had a similar issue a few days ago whenever the file was near or above what PHP max upload size is set to.

http://laravel.io/forum/02-20-2014-l40-csrf-tokenmismatchexception-when-uploading-large-files

Could that be the issue?

My max upload was actually just fine, but my max_post_size was actually the issue. Thanks for pointing that out. Now I seem to have another issue. Now when I run the file I get the max execution time error I try to upload the file (it's big enough that it could take hours). But I thought the whole point of chunking was that you could circumvent the execution time (among other things)? or is my understanding of chunk incorrect? Or did I in fact set chunk for this incorrect?