problems with Fritzbox module

[HarryT]

Hi

I use the Fritzbox module with the definition:
  define FritzBox FRITZBOX 192.168.8.1
  attr FritzBox allowTR064Command 1
  attr FritzBox boxUser admin
  attr FritzBox ringWithIntern 610
  attr defaultCallerName Fhem
  attr FritzBox INTERVAL 300

(the ringwithintern might not work as it seems only 1|2|3 is allowed)

Now I see in the logging about every 60 seconds:
2017.07.21 14:44:00 3: FRITZBOX: set FritzBox update
2017.07.21 14:44:55 1: Timeout for FRITZBOX_Readout_Run_Web reached, terminated process 19339
2017.07.21 14:44:56 1: FRITZBOX FritzBox: Readout_Aborted.1858 Error: Timeout when reading Fritz!Box data.
2017.07.21 14:45:01 3: FRITZBOX: set FritzBox update
2017.07.21 14:45:56 1: Timeout for FRITZBOX_Readout_Run_Web reached, terminated process 19372
2017.07.21 14:45:56 1: FRITZBOX FritzBox: Readout_Aborted.1858 Error: Timeout when reading Fritz!Box data.
2017.07.21 14:48:01 3: FRITZBOX: set FritzBox update
2017.07.21 14:48:56 1: Timeout for FRITZBOX_Readout_Run_Web reached, terminated process 19507
2017.07.21 14:48:56 1: FRITZBOX FritzBox: Readout_Aborted.1858 Error: Timeout when reading Fritz!Box data.

What can be wrong?

My Fritzbox is a 7490 with Freetz and Fhem currently running.  The log is from Fhem running on a RaspberryPi 700 Mhz.