Hi,
with the last version 1.0.4, the repeater-server shutdown was abrupt during work.
2021-03-21 15:08:15: Webdirectory: /usr/local/Repetier-Server/www/
2021-03-21 15:08:15: Storage directory: /var/lib/Repetier-Server/
2021-03-21 15:08:15: Configuration file: /usr/local/Repetier-Server/etc/RepetierServer.xml
2021-03-21 15:08:15: Directory for temporary files: /tmp/
2021-03-21 15:08:15: Reading firmware data ...
2021-03-21 15:08:15: Starting Network ...
2021-03-21 15:08:15: Active features:4095
2021-03-21 15:08:15: Reading printer configurations ...
2021-03-21 15:08:15: Reading printer config /var/lib/Repetier-Server/configs/U20.xml
2021-03-21 15:08:15: Starting printjob manager thread for U20
2021-03-21 15:08:15: Starting printer threads ...
2021-03-21 15:08:15: Starting printer thread for U20
2021-03-21 15:08:15: Starting work dispatcher subsystem ...
2021-03-21 15:08:15: Starting user database ...
2021-03-21 15:08:15: Importing projects ...
2021-03-21 15:08:15: Importing wifi connections from /var/lib/Repetier-Server/database/repetier-network.xml
2021-03-21 15:08:16: Importing wifi connections from /var/lib/Repetier-Server/database/repetier-network-stored.xml
2021-03-21 15:08:16: Initializing LUA ...
2021-03-21 15:08:16: Starting wifi watcher ...
2021-03-21 15:08:16: Register LUA cloud services
2021-03-21 15:08:16: add G-Code-Renderer
2021-03-21 15:08:16: LUA initalization finished.
2021-03-21 15:08:16: Internal work dispatcher thread started.
2021-03-21 15:08:16: Starting web server ...
2021-03-21 15:08:16: Work dispatcher thread started.
2021-03-21 15:08:16: Webserver started.
2021-03-21 15:08:17: Connection started: U20
2021-03-21 15:08:17: Reset printer U20
2021-03-21 15:08:19: New SSID Docman
2021-03-21 15:08:27: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:08:27: Port closed for U20
2021-03-21 15:08:27: Connection closed: U20
2021-03-21 15:08:28: Connection started: U20
2021-03-21 15:08:28: Reset printer U20
2021-03-21 15:08:35: Websocket opened
2021-03-21 15:08:38: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:08:38: Port closed for U20
2021-03-21 15:08:38: Connection closed: U20
2021-03-21 15:08:39: Connection started: U20
2021-03-21 15:08:39: Reset printer U20
2021-03-21 15:08:49: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:08:49: Port closed for U20
2021-03-21 15:08:49: Connection closed: U20
2021-03-21 15:08:50: Connection started: U20
2021-03-21 15:08:50: Reset printer U20
2021-03-21 15:09:00: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:09:00: Port closed for U20
2021-03-21 15:09:00: Connection closed: U20
2021-03-21 15:09:02: Connection started: U20
2021-03-21 15:09:02: Reset printer U20
2021-03-21 15:09:12: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:09:12: Port closed for U20
2021-03-21 15:09:12: Connection closed: U20
2021-03-21 15:09:13: Connection started: U20
2021-03-21 15:09:13: Reset printer U20
2021-03-21 15:09:23: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:09:23: Port closed for U20
2021-03-21 15:09:23: Connection closed: U20
2021-03-21 15:09:25: Connection started: U20
2021-03-21 15:09:25: Reset printer U20
2021-03-21 15:09:35: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:09:35: Port closed for U20
2021-03-21 15:09:35: Connection closed: U20
2021-03-21 15:09:37: Connection started: U20
2021-03-21 15:09:37: Reset printer U20
2021-03-21 15:09:47: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:09:47: Port closed for U20
2021-03-21 15:09:47: Connection closed: U20
2021-03-21 15:09:49: Connection started: U20
2021-03-21 15:09:49: Reset printer U20
2021-03-21 15:09:59: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:09:59: Port closed for U20
2021-03-21 15:09:59: Connection closed: U20
2021-03-21 15:10:00: Connection started: U20
2021-03-21 15:10:00: Reset printer U20
2021-03-21 15:10:10: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:10:10: Port closed for U20
2021-03-21 15:10:10: Connection closed: U20
2021-03-21 15:10:12: Connection started: U20
2021-03-21 15:10:12: Reset printer U20
2021-03-21 15:10:23: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:10:23: Port closed for U20
2021-03-21 15:10:23: Connection closed: U20
2021-03-21 15:10:24: Connection started: U20
2021-03-21 15:10:24: Reset printer U20
2021-03-21 15:10:34: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:10:34: Port closed for U20
2021-03-21 15:10:34: Connection closed: U20
2021-03-21 15:10:35: Connection started: U20
2021-03-21 15:10:35: Reset printer U20
2021-03-21 15:10:45: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:10:45: Port closed for U20
2021-03-21 15:10:45: Connection closed: U20
2021-03-21 15:10:46: Connection started: U20
2021-03-21 15:10:46: Reset printer U20
2021-03-21 15:10:56: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:10:56: Port closed for U20
2021-03-21 15:10:56: Connection closed: U20
2021-03-21 15:10:57: Connection started: U20
2021-03-21 15:10:57: Reset printer U20
2021-03-21 15:11:07: No valid response seen within 10 seconds from printer, restarting connection
2021-03-21 15:11:07: Port closed for U20
2021-03-21 15:11:07: Connection closed: U20
2021-03-21 15:11:09: Connection started: U20
2021-03-21 15:11:09: Reset printer U20
2021-03-21 15:11:55: Websocket opened
2021-03-21 15:13:05: Job created: /var/lib/Repetier-Server/printer/U20/jobs/00000001_AU20_Cube20x20.u
2021-03-21 15:13:05: finish job creation /var/lib/Repetier-Server/printer/U20/jobs/00000001_AU20_Cube20x20.u
2021-03-21 15:13:05: start printjob AU20_Cube20x20 on printer U20
2021-03-21 15:16:06: killing printjob AU20_Cube20x20 on printer U20
2021-03-21 15:20:20: Websocket opened
2021-03-21 15:22:52: MainRequestHandler::handleRequest:Assertion violation