I am having the same issue. It crashes trying to connect to the server requesting microblocks: tile.blockDiamond, tile.blockEmerald, tile.blockGold, tile.blockIron, tile.blockLapis, tile.bookshelf, tile.dirt, tile.lightgem, tile.sandStone_1, tile.sandStone_2, tile.stonebrick, tilestonebricksmooth, tile.stonebricksmooth_1, tilestonebricksmooth_2, and tilestonebricksmooth_3. Either I need to remove the need for microblocks or add microblocks to the server.