If you meet the problem on LEB2 accessibility which appears DNS_PROBE_FINISHED_NXDOMAIN on a screen. We recommend you to follow these steps as below;
How to set DNS server for Android which users via wifi
1. Go to Setting
2. Click the cog/gear icon which is behind connected wifi
3. Select Advance
4. Select Static
5. Scroll down to DNS 1 and fill the number 1.1.1.1 and fill the number 1.0.0.1 at DNS 2
Or if you have already filled out the first set of number above, but still cannot access LEB2. Try this 2nd set of number. Fill 8.8.8.8 at DNS 1 and 8.8.4.4 at DNS 2.
6. Click Save (if the value has not changed, try turning wifi off-on again))