https://wccftech.com/the-elder-scrolls-v-skyrim-anniversary-edition-not-compatible-mods/

The Elder Scrolls V: Skyrim Anniversary Edition will break compatibility with a lot of existing mods, according to the developer of one of the game's most popular modding tools.

Extrwi, the developer of the Skyrim Script Extender, revealed on Reddit that the upcoming release, which will launch as a free update for all owners of the game on PC, will break compatibility with a lot of existing mods due to the new version of the game which will use the Visual Studio 2019 compiler over the 2015 version used in the Special Edition.