App launch not working

i had the app for awhile and one day i couldnt connect to anything that required internet. I tried opening the app but whenever i tapped the app it just shows the thumbnail for a second then crashes. I removed the dns from my vpn’s so i could use the internet again and tried reinstalling but it just wont open anymore. anyone know a fix. i have an iphone 6 running ios 12.3 beta

It’s quite possible it’s just not compatible with the beta version of 12.3. There have been a couple of recent updates on the app and one of them might be when your app stopped working.

I recommend you try to look back at when you updated the app and/or the beta and see if one of them corresponds to when the app stopped working.