Thanks a lot for the testing!
Unfortunately I don’t have a quick fix in this case, we will need to take a deeper look at this.
I believe it is related to Android 14, possibly only for the OnePlus model.
Hopefully it can be adressed soon.
In the meantime, one option is to use app.blokada.org to configure the same service as the app would provide. If you’re not sure what your account ID is or have other questions related to your account, please e-mail us at hello@blokada.org