error 20001, Unknown error, Network error

Chpokalo

All heroes goes down to 1lvl EW3. Has account on EW3 monk 42 lvl and warrior 26 lvl. After update all heroes down to 1 lvl. When entered I see that monk is in legendary mode, all dangeons are opened but when I try to enter to some dangeon see such massage 1. Unknown error, Network error, 20001 Unknown error. Reinstall 5 times and nothing changed.
1. Game - Eternity warriors 3
2. Device - ASUS MeMO Pad FHD 10 (ME302C-1B061A)
3. Android 4.3
4. Your nickname - Chpokalo