If you try to run the current USSEP on Skyrim 1.5.97, you will likely encounter:
This article is accurate as of 2026. Always check the USSEP changelog and the Skyrim SE Steam beta branches before updating. skyrim ussep 1.5.97
To establish a stable 1.5.97 modding environment with the correct patch, follow these precise steps. Step 1: Downgrade Your Skyrim Executable If you try to run the current USSEP on Skyrim 1