(I'm running the Steam version of the game)
Whenever I try to launch the game with OBSE installed, it gets to the launcher but when I press "play" in the launcher, the game just doesn't launch. My mod manager is Wrye Bash, and I just launch the game by clicking the "play" button in the Steam menu. I've tried uninstalling my mods and running the game vanilla, which didn't work. However, I realized that when I deleted OBSE and ran the game WITH my mods installed, it started up and worked just fine. However, OBSE is required for some mods I have, so I need to find a fix for this so that I can actually play the game. I use OBSE version 0021 from the official website, but I've tried the mirror from the Nexus, which didn't work either. I've heard this could be caused by missing masters, but Wrye Bash indicates that all mods are in perfect working order. I've verified the game files, reinstalled the game, deleted the Oblivion folder in Documents, and none of it worked. The game is installed in C:\Games, so it's not a problem of being in Program Files. I also want to mention that I've played Oblivion on my computer before WITH OBSE, and it worked fine, so I'm at a loss for what to do.
My current load order (sorted with LOOT):
00 Oblivion.esm
01 Morrowind_ob.esm
02 RealisticLeveling.esm
03 All Natural Base.esm [Version 1.37]
04 Unofficial Oblivion Patch.esp [Version 3.5.5]
05 UOP Vampire Aging & Face Fix.esp [Version 1.0.0]
06 Oblivion Citadel Door Fix.esp
07 DLCShiveringIsles.esp
08 Unofficial Shivering Isles Patch.esp [Version 1.5.9]
09 DLCBattlehornCastle.esp
0A DLCBattlehornCastle - Unofficial Patch.esp [Version 1.0.12]
0B DLCThievesDen.esp
0C DLCThievesDen - Unofficial Patch.esp [Version 1.0.15]
0D DLCThievesDen - Unofficial Patch - SSSB.esp [Version 1.0.14]
0E DLCMehrunesRazor.esp
0F DLCMehrunesRazor - Unofficial Patch.esp [Version 1.0.7]
10 DLCVileLair.esp
11 DLCVileLair - Unofficial Patch.esp [Version 1.0.11]
12 DLCHorseArmor.esp
13 DLCHorseArmor - Unofficial Patch.esp [Version 1.0.9]
14 DLCOrrery.esp
15 DLCOrrery - Unofficial Patch.esp [Version 1.0.7]
16 DLCSpellTomes.esp
17 DLCSpellTomes - Unofficial Patch.esp [Version 1.0.1]
18 DLCFrostcrag.esp
19 DLCFrostcrag - Unofficial Patch.esp [Version 1.0.10]
1A Knights.esp
1B Knights - Unofficial Patch.esp [Version 1.1.8]
1C PersuasionOverhaul.esp [Version 1.43]
1D DKSpellEffectiveness0Min.esp
1E ChaseCameraMod.esp
1F Oblivion_Character_Overhaul.esp [Version 2.0]
20 Auto Update Leveled Items And Spells.esp [Version 1.2.5]
21 P1DkeyChain.esp [Version 5.00]
22 Enhanced Hotkeys.esp [Version 2.3.1]
23 Dynamic Map.esp [Version 2.1.1]
24 Morrowind_ob - MorroblivionTreeReplacer.esp
25 Morrowind_ob - Conversation.esp
26 Morrowind_ob - UCWUS.esp [Version 1.1]
27 WindowLightingSystem.esp
28 All Natural - SI.esp [Version 1.37]
29 All Natural - Real Lights.esp [Version 1.37]
2A All Natural.esp [Version 1.37]
2B Gottshaw Village.esp [Version 1.0.1]
2C Morrowind_ob - Chargen and Transport Mod.esp [Version 11]
2D Morrowind_ob.esp
2E Morrowind_ob - Morroblivion Maps.esp
2F ANMorrowind.esp
30 Bashed Patch, 0.esp