Installing Problems... Help

Please post a description of your problem, if possibly in English. Just a picture makes us guess as to what exactly is your problem, and that doesn’t help.

I tried installing from the command line (sudo flatpak install io.designer.GravitDesigner); maybe the OP’s issue was this:

6. [✗] io.designer.GravitDesigner           stable i  flathub 200.7 MB / 206.0 MB

Error: While trying to apply extra data: apply_extra script failed, exit status 256
error: Failed to install io.designer.GravitDesigner: While trying to apply extra data: apply_extra script failed, exit status 256

Which looks like an upstream problem affecting the flatpak: