Ibirtem

Seems to have found the problem. It's happens only with... OptiFine.

Yes. there new log https://gist.github.com/Ibirtem/2080201fdc52eb790eca98f23543bff2

Only this. Everytime

A friend lives in a different time zone

I posted... My Debug: https://gist.github.com/Ibirtem/89c5a828a7cf7eb64e8387d075216453 debug from client who can't join: https://gist.github.com/Ibirtem/3339194ef6025f80ebb1d457d3d65a09

It's singleplayer, so i don't see this message. Both of us delete mod, so how friend debug log says that these blocks are still there?

So that's the problem. How i say, after installing new mods, friend can't join to me, bcz "Failed to synchronize registry data from server, closing connection". As I recall, the error was in non-existing objects from the mod SnowRealMagic, but huh, we dont deleting this mod. Only install new. YeS he has that mod to. And after we removed this new mod with the hope that the mod just breaks the server. I dont have this mods, but Forge not deleting old... Files i guess? There lines from my debug after entering in world: [23дек2020 07:29:06.987] [Render thread/ERROR] [net.minecraftforge.registries.GameData/REGISTRIES]: Unidentified mapping from registry minecraft:block betterendforge:aeternium_block: 6517 betterendforge:aurora_crystal: 6520 betterendforge:blue_vine: 6534 betterendforge:blue_vine_fur: 6536 betterendforge:blue_vine_lantern: 6535 betterendforge:blue_vine_seed: 6533 betterendforge:bubble_coral: 6544 betterendforge:cave_bush: 6537 betterendforge:cave_grass: 6530 betterendforge:cave_moss: 6508 betterendforge:cave_moss_path: 6515 betterendforge:chorus_grass: 6529 betterendforge:chorus_nylium: 6507 betterendforge:chorus_nylium_path: 6514 betterendforge:creeping_moss: 6528 betterendforge:crystal_grass: 6531 betterendforge:crystal_moss: 6504 betterendforge:crystal_moss_path: 6511 betterendforge:cyan_moss: 6550 betterendforge:dense_vine: 6551 betterendforge:dragon_tree_bark: 6622 betterendforge:dragon_tree_button: 6628 betterendforge:dragon_tree_door: 6631 betterendforge:dragon_tree_fence: 6626 betterendforge:dragon_tree_gate: 6627 betterendforge:dragon_tree_leaves: 6562 betterendforge:dragon_tree_log: 6621 betterendforge:dragon_tree_planks: 6623 betterendforge:dragon_tree_pressure_plate: 6629 betterendforge:dragon_tree_sapling: 6561 betterendforge:dragon_tree_slab: 6625 betterendforge:dragon_tree_stairs: 6624 betterendforge:dragon_tree_stripped_bark: 6620 betterendforge:dragon_tree_stripped_log: 6619 betterendforge:dragon_tree_trapdoor: 6630 betterendforge:end_lily: 6539 betterendforge:end_lily_seed: 6538 betterendforge:end_lotus_bark: 6596 betterendforge:end_lotus_button: 6602 betterendforge:end_lotus_door: 6605 betterendforge:end_lotus_fence: 6600 betterendforge:end_lotus_flower: 6543 betterendforge:end_lotus_gate: 6601 betterendforge:end_lotus_leaf: 6542 betterendforge:end_lotus_log: 6595 betterendforge:end_lotus_planks: 6597 betterendforge:end_lotus_pressure_plate: 6603 betterendforge:end_lotus_seed: 6540 betterendforge:end_lotus_slab: 6599 betterendforge:end_lotus_stairs: 6598 betterendforge:end_lotus_stem: 6541 betterendforge:end_lotus_stripped_bark: 6594 betterendforge:end_lotus_stripped_log: 6593 betterendforge:end_lotus_trapdoor: 6604 betterendforge:end_moss: 6506 betterendforge:end_moss_path: 6513 betterendforge:end_mycelium: 6505 betterendforge:end_mycelium_path: 6512 betterendforge:end_portal_block: 6566 betterendforge:end_stone_smelter: 6565 betterendforge:ender_block: 6519 betterendforge:ender_ore: 6521 betterendforge:endstone_dust: 6510 betterendforge:eternal_pedestal: 6563 betterendforge:flavolite: 6632 betterendforge:flavolite_bricks: 6641 betterendforge:flavolite_bricks_slab: 6643 betterendforge:flavolite_bricks_stairs: 6642 betterendforge:flavolite_bricks_wall: 6644 betterendforge:flavolite_button: 6639 betterendforge:flavolite_pillar: 6635 betterendforge:flavolite_polished: 6633 betterendforge:flavolite_pressure_plate: 6640 betterendforge:flavolite_runed: 6522 betterendforge:flavolite_runed_eternal: 6523 betterendforge:flavolite_slab: 6637 betterendforge:flavolite_stairs: 6636 betterendforge:flavolite_tiles: 6634 betterendforge:flavolite_wall: 6638 betterendforge:infusion_pedestal: 6564 betterendforge:lacugrove_bark: 6583 betterendforge:lacugrove_button: 6589 betterendforge:lacugrove_door: 6592 betterendforge:lacugrove_fence: 6587 betterendforge:lacugrove_gate: 6588 betterendforge:lacugrove_leaves: 6558 betterendforge:lacugrove_log: 6582 betterendforge:lacugrove_planks: 6584 betterendforge:lacugrove_pressure_plate: 6590 betterendforge:lacugrove_sapling: 6557 betterendforge:lacugrove_slab: 6586 betterendforge:lacugrove_stairs: 6585 betterendforge:lacugrove_stripped_bark: 6581 betterendforge:lacugrove_stripped_log: 6580 betterendforge:lacugrove_trapdoor: 6591 betterendforge:mossy_glowshroom_bark: 6570 betterendforge:mossy_glowshroom_button: 6576 betterendforge:mossy_glowshroom_cap: 6554 betterendforge:mossy_glowshroom_door: 6579 betterendforge:mossy_glowshroom_fence: 6574 betterendforge:mossy_glowshroom_fur: 6556 betterendforge:mossy_glowshroom_gate: 6575 betterendforge:mossy_glowshroom_hymenophore: 6555 betterendforge:mossy_glowshroom_log: 6569 betterendforge:mossy_glowshroom_planks: 6571 betterendforge:mossy_glowshroom_pressure_plate: 6577 betterendforge:mossy_glowshroom_sapling: 6553 betterendforge:mossy_glowshroom_slab: 6573 betterendforge:mossy_glowshroom_stairs: 6572 betterendforge:mossy_glowshroom_stripped_bark: 6568 betterendforge:mossy_glowshroom_stripped_log: 6567 betterendforge:mossy_glowshroom_trapdoor: 6578 betterendforge:murkweed: 6545 betterendforge:needlegrass: 6546 betterendforge:purple_polypore: 6548 betterendforge:purpur_pedestal: 6525 betterendforge:pythadendron_bark: 6609 betterendforge:pythadendron_button: 6615 betterendforge:pythadendron_door: 6618 betterendforge:pythadendron_fence: 6613 betterendforge:pythadendron_gate: 6614 betterendforge:pythadendron_leaves: 6560 betterendforge:pythadendron_log: 6608 betterendforge:pythadendron_planks: 6610 betterendforge:pythadendron_pressure_plate: 6616 betterendforge:pythadendron_sapling: 6559 betterendforge:pythadendron_slab: 6612 betterendforge:pythadendron_stairs: 6611 betterendforge:pythadendron_stripped_bark: 6607 betterendforge:pythadendron_stripped_log: 6606 betterendforge:pythadendron_trapdoor: 6617 betterendforge:quartz_pedestal: 6524 betterendforge:shadow_berry: 6547 betterendforge:shadow_grass: 6509 betterendforge:shadow_grass_path: 6516 betterendforge:shadow_plant: 6532 betterendforge:tail_moss: 6549 betterendforge:terminite_block: 6518 betterendforge:twisted_vine: 6552 betterendforge:umbrella_moss: 6526 betterendforge:umbrella_moss_tall: 6527 betterendforge:violecite: 6645 betterendforge:violecite_bricks: 6654 betterendforge:violecite_bricks_slab: 6656 betterendforge:violecite_bricks_stairs: 6655 betterendforge:violecite_bricks_wall: 6657 betterendforge:violecite_button: 6652 betterendforge:violecite_pillar: 6648 betterendforge:violecite_polished: 6646 betterendforge:violecite_pressure_plate: 6653 betterendforge:violecite_slab: 6650 betterendforge:violecite_stairs: 6649 betterendforge:violecite_tiles: 6647 betterendforge:violecite_wall: 6651 [23дек2020 07:29:06.990] [Render thread/WARN] [net.minecraftforge.registries.GameData/REGISTRIES]: Forge Mod Loader detected missing registry entries. There are 154 missing entries in this save. If you continue the missing entries will get removed. A world backup will be automatically created in your saves directory. If you continue the missing entries will get removed. So? Not removed.

Here debug from client who can't join: https://gist.github.com/Ibirtem/3339194ef6025f80ebb1d457d3d65a09 and I correctly understood that the server debug is also needed? Bcz it's Lan server and i dont know how to get it

So, after installing new mods in existing world and start LAN (Using Hamachi hah), friend can't join in my server: "Failed to synchronize registry data from server, closing connection". Deleting installed mod(s) not helpful, now this inscription will exist forever. Yes, we all have identical versions of mods and other stuff. It can happen even we update one mod. Only helpful: delet this world and create new, but it's not the best choice. Forge latest ( 1.16.4 - 35.1.13 ). Here my latest: https://gist.github.com/Ibirtem/04086dcb560758a729c8f73d0b837d94 Debug: https://gist.github.com/Ibirtem/89c5a828a7cf7eb64e8387d075216453 Also i can give you logs of my friends.