First get teleported away from there after joining. We just did that part
Then take off your HUD glasses and try to check your LP system. Likely candidates are pipes that are connected to an inventory where a lot of items go through. For example a Logistics Inventory Connector Pipe that's trying to send a ton of items into an Ender Chest that's full. Or a Crafting Logistics Pipe that's trying to put several thousand copper dust into a machine to produce copper ingots.
Just break the culprits and replace them. You may loose a bunch of items in the process though. Also a server restart usually solves the problem.