UNSOLVED terminating http server on port 8081

[oggy1979]

Systemdata	Bitte Ausfüllen
Hardwaresystem:	Pi4
Arbeitsspeicher:	4GB
Festplattenart:	SD-Karte
Betriebssystem:	Raspbian light Buster
Node-Version:	10.18.1
Nodejs-Version:	10.18.1
NPM-Version:	6.13.4
Installationsart:	Manuell
Image genutzt:	Ja
Ort/Name der Imagedatei:	https://www.iobroker.net/#de/download

2020-01-14 18:35:28.356  - info: admin.0 (1437) terminating http server on port 8081
2020-01-14 18:35:28.432  - info: admin.0 (1437) terminating
2020-01-14 18:35:28.434  - info: admin.0 (1437) Terminated (NO_ERROR): Without reason
2020-01-14 18:35:29.305  - error: host.raspberrypi Caught by controller[0]: TypeError: Cannot read property 'isValidUTF8' of undefined
2020-01-14 18:35:29.306  - error: host.raspberrypi Caught by controller[0]:     at /opt/iobroker/node_modules/ws/lib/Receiver.js:532:29
2020-01-14 18:35:29.306  - error: host.raspberrypi Caught by controller[0]:     at /opt/iobroker/node_modules/ws/lib/Receiver.js:368:7
2020-01-14 18:35:29.306  - error: host.raspberrypi Caught by controller[0]:     at /opt/iobroker/node_modules/ws/lib/PerMessageDeflate.js:249:5
2020-01-14 18:35:29.306  - error: host.raspberrypi Caught by controller[0]:     at afterWrite (_stream_writable.js:485:3)
2020-01-14 18:35:29.306  - error: host.raspberrypi Caught by controller[0]:     at onwrite (_stream_writable.js:476:7)
2020-01-14 18:35:29.307  - error: host.raspberrypi Caught by controller[0]:     at InflateRaw.afterTransform (_stream_transform.js:94:3)
2020-01-14 18:35:29.307  - error: host.raspberrypi Caught by controller[0]:     at Zlib.processCallback (zlib.js:557:8)
2020-01-14 18:35:29.307  - info: host.raspberrypi instance system.adapter.admin.0 terminated with code 0 (NO_ERROR)
2020-01-14 18:35:29.307  - info: host.raspberrypi Restart adapter system.adapter.admin.0 because enabled

Fehler wird seit Neustart des Raspbian geloggt. Zuvor ist er durch einen Stromausfall leider wenige Sekunden vom Stromnetz getrennt gewesen

Was ist das bzw wie kann ich das lösen?