Failed to prime picture

[MrMister76]

I have setup a new ZM 1.32.3 installation using the docker image from dlandon which also contains the EventServer.
I have tried to connect a camera from KinCam using rtsp but I get the following errors:

Unable to open input rtsp://admin:XXX@<IP>:554/onvif1 due to: Operation now in progress zm_ffmpeg_camera.cpp 357
2019-10-19 16:37:55 zmwatch 10037 ERR Memory map file '/dev/shm/zm.mmap.1' does not exist. zmc might not be running. zmwatch.pl
2019-10-19 16:37:34 zmc_m1 10357 ERR Failed to prime capture of initial monitor zmc.cpp 253
2019-10-19 16:37:34 zmc_m1 10357 ERR Unable to open input rtsp://admin:XXX@<IP>:554/onvif1 due to: Interrupted system call zm_ffmpeg_camera.cpp 357
2019-10-19 16:37:14 zmc_m1 10354 ERR Failed to prime capture of initial monitor

The URL and the authentication is correct as I can connect to it using VLC. I can also capture video using ffmpeg -i <URL> which tells me it received an AAC video.
Both capture and preview of the cam don't work in ZM. Config is TCP with 1920 x 1080. ONVIF probes from other clients also find the camera and show the video.
I am really lost..

[MrMister76]

Update: I upgraded to version 1.33 and enabled ffmpeg debug. I noticed this:
Nonmatching transport in server reply

So the camera wants UDP instead of TCP...