I still have the error. I did everything they said, nothing worked.

2019-09-23 18:14:54.809719|INFO |ServerLibPriv | |TeamSpeak 3 Server 3.9.1 (2019-07-02 13:17:23)
2019-09-23 18:14:54.817405|INFO |ServerLibPriv | |SystemInformation: Linux 4.15.0-64-generic #73-Ubuntu SMP Thu Sep 12 13:16:13 UTC 2019 x86_64 Binary: 64bit
2019-09-23 18:14:54.817433|INFO |ServerLibPriv | |Using hardware aes
2019-09-23 18:14:54.853675|INFO |DatabaseQuery | |dbPlugin name: SQLite3 plugin, Version 3, (c)TeamSpeak Systems GmbH
2019-09-23 18:14:54.853700|INFO |DatabaseQuery | |dbPlugin version: 3.11.1
2019-09-23 18:14:54.937454|INFO |DatabaseQuery | |checking database integrity (may take a while)
2019-09-23 18:14:55.680877|INFO |ServerLibPriv | |failed to download revocation list - count: 1
2019-09-23 18:14:55.707234|INFO |Accounting | |Licensing Information
2019-09-23 18:14:55.707257|INFO |Accounting | |type : Non-Profit License
2019-09-23 18:14:55.707272|INFO |Accounting | |starting date : Sat Aug 31 00:00:00 2019
2019-09-23 18:14:55.707282|INFO |Accounting | |ending date : Wed Mar 18 00:00:00 2020
2019-09-23 18:14:55.707290|INFO |Accounting | |max virtualservers: 10
2019-09-23 18:14:55.707298|INFO |Accounting | |max slots : 512
2019-09-23 18:14:55.707963|ERROR |Accounting | |Error contacting server https://accounting2.teamspeak.com: RESOLVE_ERROR: Host not found (non-authoritative), try again later
2019-09-23 18:14:55.708161|ERROR |Accounting | |Error contacting server https://backupaccounting2.teamspeak.com: RESOLVE_ERROR: Host not found (non-authoritative), try again later
2019-09-23 18:14:55.708188|ERROR |Accounting | |Unable to connect to accounting server
2019-09-23 18:14:56.594010|INFO | | |Puzzle precompute time: 475
2019-09-23 18:14:56.596194|INFO |FileManager | |listening on 0.0.0.0:30033
2019-09-23 18:14:56.596491|ERROR | | |TS3ANetwork::ResolveHostName failed error: -2 (Name or service not known) 11
2019-09-23 18:14:56.596508|ERROR | | |Could not open default UDP connection for weblist
2019-09-23 18:14:56.942423|INFO |Query | |listening for query on 0.0.0.0:10011
2019-09-23 18:14:56.969111|INFO |Query | |listening for query ssh on 0.0.0.0:10022, [::]:10022
2019-09-23 18:14:56.978391|INFO |CIDRManager | |updated query_ip_whitelist ips: 127.0.0.1/32, ::1/128, 104.20.75.196/32,