Bungeecord plugin config keeps returning error!

Hi! I manage a currently small four server hub. Recently, I added a couple of BungeeCord plugins to our hub in order to personalize our server a bit. However my config.yml for ProxyTablist gave the following error:

while scanning an anchor
in "<unicode string>", line 43, column 6:
- '&a{playerInServer:[factions]}'
^
expected alphabetic or numeric character, but found '{'
in "<unicode string>", line 43, column 8:
- '&a{playerInServer:[factions]}'
^

Here's a copy of my config.yml: http://pastebin.com/hexse2KX

Any advise helps. Thanks!

Whats wrong with it?