Hi, I have the following problem:

Since 2 days my server will be stopped every 2,5 hours so that I must start them again manually.
I have 2 instances running with my non profit license (NPL)

In the server log with "_0" at the end, where all server activities are logged is the following to see:

2019-03-06 18:51:48.465223|INFO |ServerLibPriv | |TeamSpeak 3 Server 3.6.1 (2019-01-30 07:34:52)
2019-03-06 18:51:48.466227|INFO |ServerLibPriv | |SystemInformation: Windows Server 2012 R2 (9600) x64 (AMD or Intel) Binary: 64bit
2019-03-06 18:51:48.466227|INFO |ServerLibPriv | |Using hardware aes
2019-03-06 18:51:48.466227|INFO |DatabaseQuery | |dbPlugin name: SQLite3 plugin, Version 3, (c)TeamSpeak Systems GmbH
2019-03-06 18:51:48.466227|INFO |DatabaseQuery | |dbPlugin version: 3.11.1
2019-03-06 18:51:48.468076|INFO |DatabaseQuery | |checking database integrity (may take a while)
2019-03-06 18:51:48.517231|INFO |Accounting | |Licensing Information
2019-03-06 18:51:48.517231|INFO |Accounting | |type : Non-Profit License
2019-03-06 18:51:48.517231|INFO |Accounting | |starting date : Wed Mar 6 00:00:00 2019
2019-03-06 18:51:48.517231|INFO |Accounting | |ending date : Sun May 26 00:00:00 2019
2019-03-06 18:51:48.517231|INFO |Accounting | |max virtualservers: 10
2019-03-06 18:51:48.517231|INFO |Accounting | |max slots : 512
2019-03-06 18:51:48.702248|INFO |ServerLibPriv | |failed to download revocation list - count: 1
2019-03-06 18:51:49.570327|INFO |ServerLibPriv | |failed to download revocation list - count: 1
2019-03-06 18:51:51.254527|ERROR |Accounting | |Server https://accounting2.teamspeak.com replied with status: 403 Forbidden
2019-03-06 18:51:51.823071|ERROR |Accounting | |Error contacting server https://backupaccounting2.teamspeak.com: RESOLVE_ERROR: Der angegebene Host ist unbekannt
2019-03-06 18:51:51.823537|ERROR |Accounting | |Unable to connect to accounting server
2019-03-06 18:51:51.917549|INFO | | |Puzzle precompute time: 3372
2019-03-06 18:51:51.917549|INFO |FileManager | |listening on 5.175.24.44:40044
2019-03-06 18:51:51.955554|WARNING |VirtualSvrMgr | |no VirtualServer matches supplied machine_id( 2)
2019-03-06 18:51:51.955554|INFO |Query | |listening for query on 5.175.24.44:20022, [::]:20022
2019-03-06 18:51:51.955554|INFO |Query | |listening for query ssh on 0.0.0.0:10022, [::]:10022
2019-03-06 18:51:51.957074|INFO |CIDRManager | |updated query_ip_whitelist ips: 127.0.0.1/32, 5.175.24.44/32,

When I remove the NPL file (license.dat) and start the server again then the log file lokks so (and the server will not be stopped):

2019-03-06 18:55:49.990738|INFO |ServerLibPriv | |TeamSpeak 3 Server 3.6.1 (2019-01-30 07:34:52)
2019-03-06 18:55:49.990738|INFO |ServerLibPriv | |SystemInformation: Windows Server 2012 R2 (9600) x64 (AMD or Intel) Binary: 64bit
2019-03-06 18:55:49.990738|INFO |ServerLibPriv | |Using hardware aes
2019-03-06 18:55:49.991739|INFO |DatabaseQuery | |dbPlugin name: SQLite3 plugin, Version 3, (c)TeamSpeak Systems GmbH
2019-03-06 18:55:49.991739|INFO |DatabaseQuery | |dbPlugin version: 3.11.1
2019-03-06 18:55:49.991739|INFO |DatabaseQuery | |checking database integrity (may take a while)
2019-03-06 18:55:50.013753|WARNING |Accounting | |Unable to open C:/Users/Administrator/Desktop/TS3-2/licensekey.dat, falling back to limited functionality
2019-03-06 18:55:50.014741|INFO |Accounting | |Licensing Information
2019-03-06 18:55:50.014741|INFO |Accounting | |licensed to : Anonymous
2019-03-06 18:55:50.014741|INFO |Accounting | |type : No License
2019-03-06 18:55:50.014741|INFO |Accounting | |starting date : Sun Jul 1 00:00:00 2018
2019-03-06 18:55:50.014741|INFO |Accounting | |ending date : Wed Jul 31 00:00:00 2019
2019-03-06 18:55:50.014741|INFO |Accounting | |max virtualservers: 1
2019-03-06 18:55:50.014741|INFO |Accounting | |max slots : 32
2019-03-06 18:55:50.064757|INFO |ServerLibPriv | |failed to download revocation list - count: 1
2019-03-06 18:55:51.133847|INFO |ServerLibPriv | |failed to download revocation list - count: 1
2019-03-06 18:55:51.464877|ERROR |Accounting | |local accounting reports an already running instance, instance will shutdown
2019-03-06 18:55:53.172037|INFO | | |Puzzle precompute time: 3135
2019-03-06 18:55:53.173037|INFO |FileManager | |listening on 5.175.24.44:40044
2019-03-06 18:55:53.251045|WARNING |VirtualSvrMgr | |no VirtualServer matches supplied machine_id( 2)
2019-03-06 18:55:53.251045|INFO |Query | |listening for query on 5.175.24.44:20022, [::]:20022
2019-03-06 18:55:53.252045|INFO |Query | |listening for query ssh on 0.0.0.0:10022, [::]:10022
2019-03-06 18:55:53.252045|INFO |CIDRManager | |updated query_ip_whitelist ips: 127.0.0.1/32, 5.175.24.44/32,
2019-03-06 18:55:53.336051|ERROR |VirtualSvrMgr | |hourlyHandler throwed: Der E/A-Vorgang wurde wegen eines Threadendes oder einer Anwendungsanforderung abgebrochen

The server is running at version 3.6.1 on a "Windows Server 2012 R2"