Hi @pumpkin,
What browser are you using? It's possible that the barplot is simply too large of an SVG to be rendered 
Does running qiime tools view taxa_bar_plots.qzv say anything different in your browser?
q2view (the website you are on) doesn't host any of the data, nor does it really have a server to inspect it, instead it sends your browser the code to do all of that work on it's own. That means that its URLs aren't exactly real locations, but something that is made up on the fly based on your own computer's data. If you upload your artifact/visualization elsewhere, then you can share a link that knows how to fetch the data again, but it's really just a shortcut.
However, you should be able to upload your qzv on this forum, if your metadata doesn't have sensitive information 