Schlegel dimmer modules turn on but won't turn off anymore-HELP

I’ve been using these Schlage dimmer modules for about a year now. I haven’t had any problems at all. Now suddenly two of them will only turn the light on. They won’t turn the lights off with the app or with the manual button. Has anyone had this problem? Does anyone have any ideas as to how to fix it? I’m wondering if I can disable them and reinstall them? I’m very new to this. I’d appreciate any thoughts or advice.