@nicomiguelino I had to restart the device because I no longer had access after your message. After that, everything worked again and I was able to install the offered update via SSH.
Here is a screenshot, the image was frozen and the animated GIF under the Google presentation link no longer moved:
However, I have noticed that the free RAM is getting smaller and smaller. At the beginning there was still over 1 GB free, now it is only 700 MB.
Is it possible to restart the device automatically every night, I think the screen would then no longer freeze.
Before Update:
After Update and 6,5 hours:
admin@raspberrypi-treppe-1l:~ $ free -h
total used free shared buff/cache available
Mem: 1.7Gi 1.0Gi 80Mi 109Mi 788Mi 693Mi
Swap: 0B 0B 0B
admin@raspberrypi-treppe-1l:~ $ ps aux --sort=-%mem | head
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
admin 1624 5.1 23.3 556184 414020 ? Sl 09:29 20:25 python3 viewer.py
admin 2095 66.7 11.5 435204 204192 pts/0 Sl+ 09:31 264:52 /usr/local/qt5pi/libexec/QtWebEngineProcess --type=renderer --disable-speech-api --enable-threaded-compositing --enable-viewport --disable-composited-antialiasing --enable-features=AllowContentInitiatedDataUrlNavigations,NetworkServiceInProcess,OverlayScrollbar,TracingServiceInProcess --disable-features=BackgroundFetch,ConsolidatedMovementXY,DnsOverHttpsUpgrade,FontSrcLocalMatching,InstalledApp,MojoVideoCapture,PictureInPicture,SmsReceiver,UseSkiaRenderer,WebPayments,WebUSB --disable-gpu-compositing --lang=en --webengine-schemes=qrc:sLV --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=4 --shared-files
admin 1763 48.3 6.5 435548 115988 pts/0 Ssl+ 09:30 192:31 /usr/local/bin/ScreenlyWebview
root 689 1.8 4.0 980044 70904 ? Ssl 09:29 7:18 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
root 1580 0.4 2.8 69488 50820 ? Sl 09:29 1:39 /usr/bin/python3 /usr/local/bin/celery -A celery_tasks.celery worker -B -n worker@anthias --loglevel=info --schedule /tmp/celerybeat-schedule
admin 2084 0.0 2.8 244892 50820 pts/0 Sl+ 09:31 0:00 /usr/local/qt5pi/libexec/QtWebEngineProcess --type=renderer --disable-speech-api --enable-threaded-compositing --enable-viewport --disable-composited-antialiasing --enable-features=AllowContentInitiatedDataUrlNavigations,NetworkServiceInProcess,OverlayScrollbar,TracingServiceInProcess --disable-features=BackgroundFetch,ConsolidatedMovementXY,DnsOverHttpsUpgrade,FontSrcLocalMatching,InstalledApp,MojoVideoCapture,PictureInPicture,SmsReceiver,UseSkiaRenderer,WebPayments,WebUSB --disable-gpu-compositing --lang=en --webengine-schemes=qrc:sLV --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=3 --shared-files
root 1623 0.0 2.6 65304 46764 ? Sl 09:29 0:13 python3 server.py
root 1752 0.0 2.6 70828 46428 ? S 09:30 0:00 /usr/bin/python3 /usr/local/bin/celery -A celery_tasks.celery worker -B -n worker@anthias --loglevel=info --schedule /tmp/celerybeat-schedule
root 1748 0.0 2.6 81064 46420 ? S 09:30 0:02 /usr/bin/python3 /usr/local/bin/celery -A celery_tasks.celery worker -B -n worker@anthias --loglevel=info --schedule /tmp/celerybeat-schedule