See this Reddit thread for further discussion of related issues.

Some of these mods have not been updated for AE at all, and others are still in development. If you intend to install any SKSE-based mods which contain native code (.dll files), you will need to ensure that you download the version of those mods appropriate to either SE or AE. The differences between 1.5.97 and 1.6.x are very minor and generally do not affect gameplay or stability to any noticeable degree. You will still be able to use all of the new content in Anniversary Edition (provided you choose the 'best of both worlds' version of the downgrader), but it will be compatible with the SE version of SKSE (because AE is ultimately 'just' an updated SE with some extra DLC, rather than an entirely separate game as Legendary Edition was). The current recommendation is to use this tool to downgrade Skyrim to 1.5.97. Note also that the AE version of SKSE is still marked 'preliminary,' meaning that it is still under development and might not work exactly right. You need to download the SE or AE version which is appropriate for your version of Skyrim. the version before there was a 'Special Edition'), then the SKSE for that version of Skyrim is incompatible with Special/Anniversary Editions of the game. If you previously bought the Legendary Edition of Skyrim (i.e. Open your steam library, somewhere there (i think at the bottom), click add a game, then click add non-steam game, find and select your sksevr launcher thing (not the shortcut). There are different versions of SKSE for each released version of Skyrim. 2021 To install the script extender on your system, follow the below mentioned instructions: Download the Fallout 4 runtime 1 All of this should be.

Installing skyrim script extender steam