The SKSE may not be installed correctly on your computer.
Some of the Mod Manager settings on your computer may not be properly configured. The Skyrim Script Extender or the game itself may not have the elevated privileges to access certain system files. Select the Local files tab and click Verify integrity of game files… Steam will verify the game’s files. Right-click on The Elder Scrolls V: Skyrim Special Edition and select Properties.
How to install mods in Skyrim remastered on PS4 and Xbox One How do I install mods for Skyrim Xbox One Special Edition? Here you will download Vortex to your computer successfully.Now, click on Download the latest version of Mod Manager.First of all, download Vortex Mod Manager.Way to Install Blade and Sorcery Mods Using Vortex Installer:
How do I manually download nexus mods blade and sorcery?
If, like me, you use Nexus Mod Manager, the Nexus Mods tool for managing your mods, it now supports Skyrim Special Edition.