i try to load up my server and when it gets out of the queue it says starting for 5-10mins then it just says offline 
this has been appearing the last couple of days
There are 11 missing blocks and items in this save
If you want to continue the missing blocks/items will be removed.
A world back up will be automatically created in your save directory
Missing Blocks/Items
jaff:tank
jaff:fish_bucket
jaff:golden_fishing_rod
jaff:iron_nugget
jaff:diamond_fishing_rod
jaff:iron_fishing_rod
jaff:tank
jaff:wooden_fishing_rod
jaff:fish_bones
jaff:fish_spawn_egg
Run the command /fml confirm or or /fml cancel to proceed.
Alternatively start the server with -Dfml.queryResult=confirm or -Dfml.queryResult=cancel to preselect the answer.
