Cannot add a upstream server if Wi-Fi is enabled. Only through Cellular.

### Prerequisites

Please answer the following questions for yourself before submitting an issue. **YOU MAY DELETE THE PREREQUISITES SECTION.**

- [x] I am running the latest version
- [x] I checked the documentation and found no answer
- [x] I checked to make sure that this issue has not already been filed

### Issue Details

- **AdGuard version:**
- AdGuard for iOS v4.1.0
- **Device model and storage size:**
- iPhone XR
- **Operating system and version:**
- 14.4

### Behavior

Cannot add a upstream server if Wi-Fi is enabled. Only through Cellular. Error: "Вы ввели некорректный upstream" all the time🤬

### Screenshots


### Additional Information

The [verbose logs](https://github.com/AdguardTeam/AdguardForiOS/files/6004382/AdGuard_logs.zip) is attached.