Hey there @Pixel_School_3d1! Welcome to the community! HTML5 plugin support had ended back in version 4.24 due to the barriers to maintaining support, the heft of the engine, as well as very limited userbase. If your project doesn’t rely on UE5 features, you may be able to just use 4.24 and export it to HTML5, otherwise you may need to update the plugin (source code below) or to look at other options such as pixel streaming if you require web support.