Digital signing do not open certificat

Hello. I want digital signing oficial documents but i can not do it. Because Endless do not suport this application.
Please help me solve this problem

Is there a specific digital signing application you need to use?

Hello,

i m sending you a print screen of applications. I really need this one.
Please help us.

Br Jani from Ljubljana

Lp
Jani

V V pon., 4. feb. 2019 ob 22:50 je oseba Will Thompson <
community@bot.endlessm.com> napisala:

From version 3.0 on, Endless OS started adopting Flatpak, a new application distribution system

Sorry, none of the package formats offered by that publisher are supported on Endless OS. You could contact them and ask them to publish a Flatpak version (which might make it easier for them to support different Linux distributions). Otherwise, you may be able to find someone in the Slovenian Linux community who could help you make an unofficial Flatpak.

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