Installation error with flair deb package

[suncq1123 (sunchuqing)]

My system is Ubantu 20.04

I download these two package to install flair:
flair_3.2-0_ubuntu20.04_all.deb
flair-geoviewer_3.2-0_ubuntu20.04_amd64.deb

installation command:
sudo dpkg -i flair_3.2-0_ubuntu20.04_all.deb flair-geoviewer_3.2-0_ubuntu20.04_amd64.deb

Then I use command:
sudo apt -f install

When I input:flair,the following message occurred:

I don’t know how to do.

[vasilis (Vasilis Vlachoudis)]

Sorry for that, there was a problem in the build process.

Please try to download again and re-install.
If you used the automatic installation via the repo re-install the new public repository key “flair.gpg” again as it shown in the download instructions