RSS Feed/News Issue Installing Steam Authentication & Integration Add-on – ZIP Archive Not Recognized

[ENXF NET]

Hello XenForo community,

I'm currently trying to install the Steam Authentication & Integration add-on on my XenForo forum (running XenForo 2.x). However, I keep running into an issue where XenForo does not recognize my add-on archive as valid.

Issue:​

When attempting to install via ACP > Add-ons > Install/Upgrade from Archive, I receive the following error:

Oops! We ran into some problems.
The file "addon-Steam.zip" does not appear to be a valid...
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