corrupted fille, need help please

So here's the problem

I have this text file which won't open, the error code is ''Format error discovered in the file in sub-document content.xml at 2,22757(row,col).''

after a google search, I have seen some people simply uploading their corrupt file and someone with knowledge would have them fixed

I tried understanding the actual procedure, but I'm just a student doing a master degree in international politics, I have no clue where to get a xml reader and removing duplicated codes

help would be super appreciated

the file is attached

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corrupted fille, need help please