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My apologies, it's a Postscript. I was able to play for an extended period of time right after generating the world without any problems. If I close it and reopen it, I get that message at random. Once it appears, I have to modify the Level.dat to open it.

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Hello.  regarding Invalid player data.  First of all, my English is not good, so there might be mistakes. I am using Minecraft 1.20.1 forge 47.3.22 CurseForge and have over 250 mods in my modpack.　Single-player. I can play the game after generating the world (about 5 hours) and restarting it, but there is no set timing and one day it suddenly shows ''Invalid player data''. Restarted the game several times after that, but the same message appears. Fix the level.dat file and play for a few hours, but the next day when I try to open the world I get the ''Invalid player data'' message again. Can open other worlds, but after some progress in the other worlds, the same message appears and I can't start them. Is there something wrong with the mod configuration? I would be very grateful if you could tell me how to solve this problem. ◉ErrorCode https://mclo.gs/4gcfPbY   ◉ModList AdvancementPlaques-forge-1.6.9.jar AI-Improvements-1.20-0.5.2.jar alexsmobs-1.22.9.jar alternate_current-mc1.20-1.7.0.jar AmbientSounds_FORGE_v6.1.6_mc1.20.1.jar amendments-1.20-1.2.18.jar Apotheosis-1.20.1-7.4.6.jar ApothicAttributes-1.20.1-1.3.7.jar appleskin-forge-mc1.20.1-2.5.1.jar aquamirae-6.API15.jar architectury-9.2.14-forge.jar ars_elemental-1.20.1-0.6.7.7.jar ars_extended_glyphs-1.20.1-1.9.jar ars_nouveau-1.20.1-4.12.6-all.jar AttributeFix-Forge-1.20.1-21.0.4.jar azurelib-neo-1.20.1-2.0.41.jar BadOptimizations-2.2.1-1.20.1.jar balm-forge-1.20.1-7.3.16-all.jar barbequesdelight-1.0.5.jar BattleArts-20.9.7.1.jar BattleArtsAPI-20.9.5.3.jar BEB-Forge-1.20.1-2.0.0.jar bendy-lib-forge-4.0.0.jar betterendcities-1.0.0-1.20.1.jar betterfpsdist-1.20.1-6.0.jar BetterThirdPerson-Forge-1.20-1.9.0.jar bettervillage-forge-1.20.1-3.2.0.jar biggerendcities-1.20.1-1.0.0.jar blockui-1.20.1-1.0.156-RELEASE.jar blueprint-1.20.1-7.1.1.jar blur-forge-3.1.1.jar BOMD-Forge-1.20.1-1.1.1.jar Bookshelf-Forge-1.20.1-20.2.13.jar BrewinAndChewin-1.20.1-3.1.2.jar BridgingMod-2.5.1+1.20.1.forge-release.jar caelus-forge-3.2.0+1.20.1.jar CarbonConfig-1.20-1.2.6.jar Cardiac-FORGE-0.5.3.2+1.20.1.jar carryon-forge-1.20.1-2.1.2.7.jar casualness_delight-1.20.1-0.4n.jar CerbonsApi-Forge-1.20.1-1.0.0.jar chat_heads-0.13.13-forge-1.20.jar cherishedworlds-forge-6.1.7+1.20.1.jar ChoiceTheorem's Overhauled Village-3.4.11.jar Chunk-Pregenerator-1.20-4.4.4.jar citadel-2.6.1-1.20.1.jar clean_tooltips-1.0-forge-1.20.1.jar cloth-config-11.1.136-forge.jar Clumps-forge-1.20.1-12.0.0.4.jar cobweb-forge-1.20.1-1.0.1.jar CocoaInput-1.20.5-fabric-4.4.1-EXPERIMENTAL.jar collective-1.20.1-7.91.jar cosmeticarmorreworked-1.20.1-v1a.jar create-1.20.1-0.5.1.j.jar create_easy_structures-0.1.2-forge-1.20.1.jar CreativeCore_FORGE_v2.12.31_mc1.20.1.jar creeperoverhaul-3.0.2-forge.jar cristellib-1.1.6-forge.jar cuisinedelight-1.1.16.jar cupboard-1.20.1-2.7.jar curios-forge-5.11.1+1.20.1.jar CutAllSMP_v2.5.2.jar default_skill_trees-1.1.jar DisenchantmentEditTable-1.20-1.1.2.jar DistantHorizons-2.2.1-a-1.20.1-forge-fabric.jar domesticationinnovation-1.7.1-1.20.1.jar domum_ornamentum-1.20.1-1.0.186-RELEASE-universal.jar dragonitegear-0.3.2.jar Dungeon Crawl-1.20.1-2.3.15.jar dungeons-and-taverns-ancient-city-overhaul-1 [Forge].jar DungeonsArise-1.20.x-2.1.58-release.jar dungeons_enhanced-1.20.1-5.3.0.jar dungeons_plus-1.20.1-1.5.0.jar ec_isasb_plugin-1.20.1-1.0.0-all.jar efiscompat-2.2.4.jar EFMCompat 20.2.0.1.jar embeddium-0.3.31+mc1.20.1.jar EnchantmentDescriptions-Forge-1.20.1-17.1.19.jar endermanoverhaul-forge-1.20.1-1.0.4.jar EnderWyrmlings-1.0.0-forge-1.20.1.jar endrem_forge-5.3.3-R-1.20.1.jar enhanced_boss_bars-1.20.1-1.0.0.jar entityculling-forge-1.7.2-mc1.20.1.jar entity_model_features_forge_1.20.1-2.4.1.jar entity_texture_features_forge_1.20.1-6.2.9.jar Epic-Knights-9.21.jar Epic-Knights-Addon-1.22.jar Epic-Knights-Slavic-Armory-1.5.jar epicfight-forge-20.9.7-1.20.1.jar essential_1-3-5-7_forge_1-20-1.jar ExCap-20.9.7.3.jar exoticbirds-1.20.1-1.0.0.jar expanded_combat-1.20.1-3.2.4-all.jar Explorify v1.6.2 f10-48.jar extrasounds-1.20.1-forge-1.3.jar falchionmoveset-20.8.2.jar Fallingleaves-1.20.1-2.1.0.jar FarmersDelight-1.20.1-1.2.7.jar farsight-1.20.1-3.7.jar FastFurnace-1.20.1-8.0.2.jar FastSuite-1.20.1-5.0.1.jar FastWorkbench-1.20.1-8.0.4.jar ferritecore-6.0.1-forge.jar forge-medievalend-1.0.1.jar framework-forge-1.20.1-0.7.12.jar frozen_zombie_castle-1.4.0-forge-1.20.1.jar fzzy_config-0.6.4+1.20.1+forge.jar geckolib-forge-1.20.1-4.7.jar globalxp-forge-1.20.1-1.12.jar goblintraders-forge-1.20.1-1.9.3.jar gravestone-forge-1.20.1-1.0.24.jar guardvillagers-1.20.1-1.6.10.jar harvest-with-ease-forge-1.20.1-9.4.0.jar Highlighter-1.20.1-forge-1.1.9.jar hole_filler_mod-1.2.8_mc-1.20.1_forge.jar Iceberg-1.20.1-forge-1.1.25.jar ImmediatelyFast-Forge-1.3.4+1.20.4.jar ImmersiveUI-FORGE-0.3.0.jar imst-2.1.0.jar infernalmobs-1.20.1.6.jar integrated_api-1.5.1+1.20.1-forge.jar integrated_villages-1.1.5+1.20.1-forge.jar inventoryhud.forge.1.20.1-3.4.26.jar InventoryProfilesNext-forge-1.20-1.10.14.jar inventorysorter-1.20.1-23.0.8.jar InventorySpam-1.20.1-1.5.6.jar ironchest-1.20.1-14.4.4.jar irons_spellbooks-1.20.1-3.4.0.7.jar iron_repair_kits-2.4.3-forge-1.20.1.jar ItemBorders-1.20.1-forge-1.2.2.jar ItemProductionLib-1.20.1-1.0.2a-all.jar Jade-1.20.1-Forge-11.12.3.jar jei-1.20.1-forge-15.20.0.106.jar journeymap-1.20.1-5.10.3-forge.jar justhammers-forge-2.0.3+mc1.20.1.jar Kobolds-2.12.0.jar kotlinforforge-4.11.0-all.jar LegendaryTooltips-1.20.1-forge-1.4.5.jar libIPN-forge-1.20-4.0.2.jar libraryferret-forge-1.20.1-4.0.0.jar lionfishapi-2.4-Fix.jar lithostitched-forge-1.20.1-1.4.4.jar lmft-1.0.4+1.20.1-forge.jar lootbeams-1.20.1-1.2.6.jar lootintegrations-1.20.1-4.0.jar lukis-grand-capitals-1.1.1.jar L_Enders_Cataclysm-2.54- 1.20.1.jar mes-1.3.4-1.20-forge.jar mexicans_delight-1.1.1-forge-1.20.1.jar MineAllSMP_v2.6.6.jar minecolonies-1.20.1-1.1.814-snapshot.jar mna-forge-1.20.1-3.1.0.4-all.jar modernfix-forge-5.20.2+mc1.20.1.jar ModernUI-Forge-1.20.1-3.11.1.6-universal.jar modlist.txt moonlight-1.20-2.13.65-forge.jar mowziesmobs-1.7.0.jar multipiston-1.20-1.2.43-RELEASE.jar MutantMonsters-v8.0.7-1.20.1-Forge.jar mutil-1.20.1-6.1.1.jar mvs-4.1.4-1.20-forge.jar NaturesCompass-1.20.1-1.11.2-forge.jar Neat-1.20.1-41-FORGE.jar netherportalfix-forge-1.20-13.0.1.jar notenoughanimations-forge-1.9.2-mc1.20.1.jar Obscure-Tooltips-2.2.jar obscure_api-15.jar OctoLib-FORGE-0.4.2+1.20.1.jar oculus-mc1.20.1-1.8.0.jar packetfixer-forge-2.0.0-1.19-to-1.20.1.jar PackingTape-1.20.1-0.14.3.jar PassiveSkillTree-1.20.1-BETA-0.6.14a-all.jar Patchouli-1.20.1-84.1-FORGE.jar phantasm-1.0.1.jar Placebo-1.20.1-8.6.2.jar player-animation-lib-forge-1.0.2-rc1+1.20.jar polymorph-forge-0.49.8+1.20.1.jar Prism-1.20.1-forge-1.0.5.jar projectvibrantjourneys-1.20.1-6.0.5.jar puffish_attributes-0.7.2-1.20-forge.jar puffish_skills-0.14.7-1.20-forge.jar PuzzlesLib-v8.1.25-1.20.1-Forge.jar QualityCrops-1.20.1-1.3.3.jar QualitysDelight-1.20.1-1.5.3.jar Quark-4.0-460.jar QUILT-2.0.0.jar repair_amulet-2.0-forge-1.20.1.jar repurposed_structures-7.1.15+1.20.1-forge.jar resourcefulconfig-forge-1.20.1-2.1.2.jar resourcefullib-forge-1.20.1-2.1.29.jar RPG-HUD-3.10.jar rpg_companions_tiny_dragons-0.0.4-forge-1.20.1.jar run.bat samurai_dynasty-0.0.48-1.20.1-neo.jar simplyswords-forge-1.56.0-1.20.1.jar SkyVillages-1.0.4-1.19.2-1.20.1-forge-release.jar smoothboot(reloaded)-mc1.20.1-0.0.4.jar sophisticatedbackpacks-1.20.1-3.23.5.1200.jar sophisticatedcore-1.20.1-1.2.12.872.jar sound-physics-remastered-forge-1.20.1-1.4.8.jar Stackable Potions-forge-1.20.1-1.0.0.jar StorageBox_v3.2.5.jar StorageDrawers-1.20.1-12.9.13.jar Structory_1.20.x_v1.3.5.jar Structory_Towers_1.20.x_v1.0.7.jar structure_gel-1.20.1-2.16.2.jar structurize-1.20.1-1.0.764-snapshot.jar SubtleEffects-forge-1.20.1-1.8.0.jar supermartijn642configlib-1.1.8-forge-mc1.20.jar supermartijn642corelib-1.1.18-forge-mc1.20.1.jar supplementaries-1.20-3.1.13.jar TaxCastlePillager+M.1.20.1+ForM.1.0.1.jar TaxTreeGiant+M.1.20.1+ForM.1.1.0.jar TerraBlender-forge-1.20.1-3.0.1.7.jar Terralith_1.20.x_v2.5.4.jar tetra-1.20.1-6.8.0.jar TheOuterEnd-1.0.10.jar tidal-towns-1.3.4.jar tlc_forge-1.0.3-R-1.20.X.jar toms_storage-1.20-1.7.0.jar toomanyglyphs-1.20.1-2.3.2.12345.jar totw_additions-1.3.1-1.20.x-forge.jar totw_modded-forge-1.20.1-1.0.5.jar Towns-and-Towers-1.12-Fabric+Forge.jar towntalk-1.20.1-1.1.0.jar trashcans-1.0.18b-forge-mc1.20.jar trashslot-forge-1.20-15.1.1.jar travelersbackpack-forge-1.20.1-9.1.16.jar TravelersTitles-1.20-Forge-4.0.2.jar tru.e-ending-v1.1.0c.jar uncrafter-forge-1.20.1-1.2.0.jar valarian_conquest-3.0-forge-1.20.1.jar valhelsia_core-forge-1.20.1-1.1.2.jar valhelsia_structures-forge-1.20.1-1.1.2.jar villagernames-1.20.1-8.2.jar visuality-forge-2.0.2.jar waystones-forge-1.20.1-14.1.9.jar WeaponsOfMiracles-20.1.8.5.6.jar XP From Harvest Reworked-1.20.x-1.2.4.jar YetAnotherConfigLib-3.6.2+1.20.1-forge.jar YungsApi-1.20-Forge-4.0.6.jar YungsBetterDesertTemples-1.20-Forge-3.0.3.jar YungsBetterDungeons-1.20-Forge-4.0.4.jar YungsBetterEndIsland-1.20-Forge-2.0.6.jar YungsBetterJungleTemples-1.20-Forge-2.0.5.jar YungsBetterMineshafts-1.20-Forge-4.0.4.jar YungsBetterNetherFortresses-1.20-Forge-2.0.6.jar YungsBetterOceanMonuments-1.20-Forge-3.0.4.jar YungsBetterWitchHuts-1.20-Forge-3.0.3.jar YungsBridges-1.20-Forge-4.0.3.jar YungsCaveBiomes-1.20.1-Forge-2.0.1.jar YungsExtras-1.20-Forge-4.0.3.jar Zeta-1.0-24.jar  

I did exactly like in the instruction , i even copied the build.gradle from alex mobs like he told in the instruction for citadel 1.7.0 and above, and i got 100 different error no matter what i changed in the build.gradle, i once managed to make a build succesfull but then the run client wasnt working I did exactly like in the instruction , i even copied the build.gradle from alex mobs like he told in the instruction for citadel 1.7.0 and above, and i got 100 different error no matter what i changed in the build.gradle, i once managed to make a build succesfull but then the run client wasnt working

Please share a link to your crash report on https://paste.ee, as explained in the FAQ