USB Camera stopped working since 7" touchscreen added

Hi

I first tried the free Astroprint without a touch screen on rpi3 and everything worked fine as well as my Logitech webcam.

I then bought a 7" RPI screen, a Rpi 4 and reloaded new image which I licensed.

Everything works fine, but since the changes although the usb cam is detected it doesn’t stream. it just shows a circle on the screen saying preparing stream.

Thanks in advance for Any help?

THis is from my logs.

2020-05-26 09:13:24,369 - astroprint.camera.v4l2.gstreamer - INFO - Camera detected on /dev/video0
2020-05-26 09:13:24,372 - astroprint.camera.v4l2.gstreamer - INFO - Found camera UVC Camera (046d:09a5), encoding: h264 and size: 640x480. Source used: USB
2020-05-26 09:13:26,210 - astroprint.webrtc - INFO - Closing all streaming sessions
2020-05-26 09:13:26,211 - astroprint.camera.v4l2.gstreamer - INFO - There are 0 local peers left
2020-05-26 09:13:26,213 - astroprint.camera.v4l2.gstreamer - INFO - Camera detected on /dev/video0
2020-05-26 09:13:26,219 - astroprint.camera.v4l2.gstreamer - INFO - Found camera UVC Camera (046d:09a5), encoding: h264 and size: 640x480. Source used: USB
2020-05-26 09:14:13,569 - astroprint.camera.v4l2.gstreamer.pipeline - ERROR - Unable to re-start pipeline process.
2020-05-26 09:14:13,570 - astroprint.camera.v4l2.gstreamer.pipeline - ERROR - Error during photo capture: no_process
2020-05-26 09:14:33,638 - astroprint.camera:CameraInactivity - WARNING - Already running
2020-05-26 09:14:53,680 - astroprint.camera.v4l2.gstreamer.pipeline - ERROR - Unable to re-start pipeline process.
2020-05-26 09:14:53,681 - astroprint.camera.v4l2.gstreamer.pipeline - ERROR - Error during local video's frames capture: no_process
2020-05-26 09:15:16,721 - astroprint.camera.v4l2.gstreamer.pipeline - ERROR - Unable to re-start pipeline process.
2020-05-26 09:15:16,722 - astroprint.camera.v4l2.gstreamer - INFO - There are 0 local peers left
2020-05-26 09:15:16,724 - plugins.com_astroprint_astrobox_plugins_externalcomms.events_handler - INFO - OnLocalVideoStreamingStopped
2020-05-26 09:19:03,189 - astroprint.camera.v4l2.gstreamer - INFO - Camera detected on /dev/video0
2020-05-26 09:19:03,195 - astroprint.camera.v4l2.gstreamer - INFO - Found camera UVC Camera (046d:09a5), encoding: h264 and size: 640x480. Source used: USB
2020-05-26 09:19:05,212 - astroprint.webrtc - INFO - Closing all streaming sessions
2020-05-26 09:19:05,214 - astroprint.camera.v4l2.gstreamer - INFO - There are 0 local peers left
2020-05-26 09:19:05,215 - astroprint.camera.v4l2.gstreamer - INFO - Camera detected on /dev/video0
2020-05-26 09:19:05,221 - astroprint.camera.v4l2.gstreamer - INFO - Found camera UVC Camera (046d:09a5), encoding: h264 and size: 640x480. Source used: USB