Worstwurstuserlollol Thanks for sending that log file! I can see that you're trying to launch Wurst on a phone, but your PojavLauncher doesn't have permission to access the Wurst-Client-v7.49-MC1.21.6.jar file. To fix this, you will need to change the permissions of that file so that your launcher can access it.
Unfortunately, the way to change file permissions on a phone can vary greatly depending on which flavor of Android you have installed, which apps you are using for file management, and whether or not your phone is rooted, so I can't give you specific instructions on how to do that.
Also, it appears that this is indeed a completely crash from what @cerigella is reporting, since they seem to be on a Windows machine using the official Minecraft launcher.
