Langrisser IV on SNES Mini (linux) - help with seizing?

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I have gotten Langrisser IV working with the english translation on my SNES mini, using retroarch.   I'm fairly newb at all this.   The struggling I'm having is that during the first battle, as soon as I have control over a character, the game seizes.   

Is there a setting, or something I need to do different from default setup to make this work?

I don't know of any place else to ask this question.   Thank you for your time.