I have been having the same exact problem ever since we started getting ddosed, and I would love to be told how to fix it.
My error is as this:
[iNFO][09/06 04:43:06 PM]: Loaded 2 RS accounts!
[ERROR][09/06 04:43:06 PM]: Uncaught exception!
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at org.osbot.coM7.<init>(ej:110)
at org.osbot.BotApplication.iIiIiiiiIi(jp:344)
at org.osbot.BotApplication.main(jp:148)
Edit:
I fixed it, all that was needed to be done, thanks to @Alek, was to delete my OSBot local folder, and start from scratch.
Hope yours gets fixed aswell!