In my country, DOH requests from Cloudflare are blocked by the provider, however, the use of Zero Trust is necessary. Is it possible to use Dns over Warp instead of DOH as in normal warp+? (it works fine)
It changes a bit depending on platform but yes even on normal WARP you can pick DNS over WARP. On Windows it’s tray icon → gear → Preferences → Connection → DNS Protocol. On Android Settings → Advanced → Connection Options → DNS Settings. Not sure on other platforms, can’t find good docs on it, I assume not too different/you could find it by looking around a bit.
I’m not 100% sure that’s your issue though, doing a quick people have reported this issue before with wider connection issues. Looks like if you get it on connect it may be unable to resolve the WARP API to connect entirely? You could still try though, although WARP isn’t exactly made to get around such restrictions.