I am currently trying to transfer my level 24 dark elf over to SSE, but, it was modded. I have uninstalled every mod for Normal Skyrim, as well as SKSE, and made a save of them without any mods. Whenever I try to load the save, it doesn't work. It starts a loading screen then just crashes. I do have mods installed for SE, I will include them in a list below as well as my specs.

SPECS:

Intel i7 4790k 4.0GHz

Nvidia GeForce GTX 970 4GB Asus Strix Edition

Asus Rampage Motherboard

16GB HyperX

Samsung 850 1TB SSD

ENB:

Skyrim Re-Engaged Reshade + ENB COT Preset

SSE Mods:

Achievements Mods Enabler

Alternate Start - Live Another Life

ApachiiSkyHair

Ars Metallica

Climates of Tamriel

Diverse Dragons Collection SE

Enhanced Blood Textures

Enhanced Textures Detail (UV-tweaks)

ETHEREAL CLOUDS

Fantasy Forest Overhaul

Feminine Khajiit Textures

Footprints

Immersive Armors

JK's Whiterun

Leanwolfs Better Shaped Weapins

No NPC Greetings

Nordic Snow

QD Inventory

Realistic Death Physics

Realistic Ragdolls and Force

Realistic Water Two

Relatiionsip Dialogue Overhaul

Reverb and Ambiance Overhaul

RUSTIC WINDOWS

Skyrim 2017 Textures - 4K Diffuse 2K Normalmap - Landscape

Skyrim Flora Overhaul SE

SMIM

Stunning Statues of Skyrim

The Paarthurnax Dilemma

Total Character Makeover

Unique Uniques

Unofficial Skyrim SE Patch

UNP Female Body Renewal

Verdant - A Skyrim Grass Plugin

Wet and Cold

Immersive Citizens

Frostfall

Campfire

Save files that have used mods are pretty much guaranteed to not be transferable.

Bethesda stated this before the game was released.

Thanks. I'm surprised that it wouldn't work with a save that had all mods cleared.

There's plenty of residual info that remains in the save file.