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Problem to install firmware apm planner

hello i have a problem in APMplanner, i use ubuntu 18.04 and this version of apm planner "apm_planner_2.0.26_bionic64.deb"This is my ‘install firmware’ screen which is blank in both disconnected & connected state (I’m trying to configure my pixhawk1 for the first time)
Any ideas why this is occuring and how do I fix this?
image

Use a newer version! https://github.com/ArduPilot/apm_planner/releases/tag/2.0.29-rc1

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