After a few minutes App breaks down

A few days ago, two of my devices can’t keep the app open. They said, “ZeroTier One still does’t work”. However, the rest of my devices are working with no problems.

To test them, I made a new network with those two devices. The problem is the same. I removed app and installed again but nothing new.

The devices that don’t work are: Lg_Phone and Lenovo tablet, both use only wifi. Does anybody know why?

Thanks

Hello. Keep an eye out for a new version. Are both devices Android devices?

Hi, Yes, they are. LG runs Androide 8.1.0. and Lenovo runs Androide 6.0.1 they said they have the last version.