Board Thread:Questions and Answers/@comment-28311805-20170624220621/@comment-107.204.159.90-20180119070150

I know it's been a few months, but if you guys are still having this issue, although you're pretty sure everything works fine without F/A, I'd do as ASDFGirl suggests and start your mods from scratch. Below is an example of someone having the same issue as you. See the link for examples:

https://gaming.stackexchange.com/questions/214154/minecraft-vanilla-crash-illegalstateexception-expected-begin-array-but-was-stri

Also, like the previous post mentioned don't just update your Java version, make sure the previous versions are removed from your PC as well.

https://www.java.com/en/download/faq/remove_olderversions.xml