Black screens are typically caused by trying to run encrypted game files. Citra requires decrypted .3ds or .cci formats. If your file is encrypted, the emulator will fail to launch it.

New nightly or canary builds often fix bugs, but occasionally, a stable "beta" build provides the best performance for older devices. Citra 15 APK Link & Safe Download Options

: Resolved multiple GPU-related crashes that previously plagued certain Android hardware.