Jira is not based on any MS technologies, and nor are its apps, so this message is about something on your machine that is not part of Jira.
I am guessing "the excel add in" is something you are trying to install in your browser or excel, or somewhere else, and your machine does not have the supporting frameworks it needs. You'll need to follow that up by checking the installation on your machine and then with the vendors of whatever software it is you're trying to use.
Project managers know this problem: A “mountain of work” lays in front of you, and you don’t know how and where to tackle them. Different to-dos lie ahead, but just one task after the other can be ha...
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