When running move base with the navigation stack I get the following warning:

[ WARN] [1562249513.118359067]: Request for map failed; trying again...

After that nothing happens anymore. The Logfiles show that all the nodes (amcl, mapserver) started correctly and that the mapserver was able to find the map. My launch file looks as following:

<launch>

   <master auto="start"/>
 <!-- Run the map server -->
    <node name="map_server" pkg="map_server" type="map_server" args="$(find lidarborg2dnav)/maps/expLab18_servermap.pgm 0.05"/>

 <!--- Run AMCL -->
    <include file="$(find amcl)/examples/amcl_diff.launch" />

   <node pkg="move_base" type="move_base" respawn="false" name="move_base" output="screen">
    <rosparam file="$(find lidarborg2dnav)/costmap_common_params.yaml" command="load" ns="global_costmap" />
    <rosparam file="$(find lidarborg2dnav)/costmap_common_params.yaml" command="load" ns="local_costmap" />
    <rosparam file="$(find lidarborg2dnav)/local_costmap_params.yaml" command="load" />
    <rosparam file="$(find lidarborg2dnav)/global_costmap_params.yaml" command="load" />
    <rosparam file="$(find lidarborg2dnav)/base_local_planner_params.yaml" command="load" />
 </node>

</launch>

I can't upload the rqtgraph file because I do not have enough points. It shows the mapserver has started but has no subscriptions and is not publishing anything. What should the map_server provide? How can I view the map in rviz? I read and did the tutorial for the navigation stack.

Specs of the robot:

• ROS Kinetic on Lubuntu 16.04 on Raspberry Pi
• LiDAR Sensor Sick TIM
• Differential drive with 6 motors (no encoders!)
• Thunderborg motor controller

Any help would be appreciated, I can't figure out what I'm doing wrong. Thanks!