Crash after adding custom DNS server on iOS 12.5.7

[Versty]

Issue Details

• AdGuard version: 4.5.1 (1007)
• Device model and storage size: iPad mini 2th generation
• Operating system and version: 12.5.7

Steps to reproduce

1. Go to Protection -> DNS protection -> DNS server
2. Click the + Add a custom DNS server
3. Enter name and 1.1.1.1 dns address
4. Tap Save and Select

Expected Behaviour

DNS server is successfully added and selected

Actual Behaviour

AdGuard is crashed