problem with an usb-GPS dongle

[Luckbert]

Hello, everybody, 
I have a problem with an usb-GPS dongle. 
The dongle does not deliver data in OP. In the tab serial the stick is shown. I can also set it up as usual (click on Auto) and find it in kplex. No data is displayed in the diagnostic window and no real location is displayed in OpenCPN. 

But the stick seems to be ok, because if I add it to OpenCPN it returns data. 

RPI 3+
OP current
SK current

OP Debug Window 

Failed to open SPI bus 0, select 0
Failed to open SPI bus 0, select 1
no IMU detected (not installed either)
No pressure sensor detected (not installed either)
No humidity sensor detected (not installed either)

Any ideas?
Greetings Jürgen