java.io.FileNotFoundException: C:\Users\johnv\AppData\Local\Temp\jSerialComm\2.11.2\jSerialComm.dll (Access is denied) The problem is that as the static initializer attempts to find the right DLL to ...

I’m trying to install OptiFine for Minecraft 1.21.9 (preview_OptiFine_1.21.9_HD_U_J7_pre2.jar). When I double-click the .jar file, I get the blue loading circle ...