iPad or iPhone won't connect to Qu-pac

iOS 18.3 and Qu-You 1.93. Worked for years. Quit working after updated iOS to 18. Doesn’t show the mixer as an option to connect, only Demo or custom. Older iOS phones and iPads work fine. Is there a fix? Luckily, the iPad that runs the FOH mix doesn’t have the current iOS so that still works fine.

Keith