I changed my post to provide a link for you to look at.
sir, is there any way to resolve broken packages using terminal?
On my 21.04 showing terminal commands:
Download and install broken dependancies
sudo apt --fix-broken install
In the link to the topic I proved the last couple of posts suggests in terminal:
software-boutique in the command line worked
did you try entering software-boutique in terminal?
maybe you need to reinstall software boutique?
this reference should help.
`sudo snap install software-boutique --classic` should work
Type that in your terminal to see how to use the command.
I think it should be snap refresh software-boutique which will then ask you to provide your password authentication
mack87dash@mack87dash-Satellite-Pro-L300:~$ snap refresh software-boutique
snap "software-boutique" has no updates available
I'm done I'm afraid. Did you say that software boutique won't launch at all? Have you tried a reboot?
I have rebooted twice already...
sir, what else can be done?
is there any way to uninstall software boutique?
The full post on ask ubuntu:
Sir i reinstalled it but no success..it's still not responding...
i can't see any other way...kindly help.
It's late.
Perhaps someone will come up with a solution to your problem later. I can't think of any other fixes. Sorry!
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it's okay sir..thank you for giving me some of your precious time. Your are awesome.
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Thank you Sir @mdooley . The second link helped. Here the solution is
"~$ sudo apt-get update --fix-missing". I just ran it in the terminal and it rectified everything. you are awesome...rather i say you both @24601 & @mdooley are awesome.
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Wonderful news @mack87-dash I'm so happy that you finally got it fixed. Got there eventually. Have a great day 
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