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Android / Amazon Fire Build Failed: java.io.IOException


I have tried testing my game on both an Android Emulator and an actual Android Phone, AVD used x86 architecture, my actual phone allowed for x64. It fails every time. I have also tried testing multiple projects so it isn't something in my game's code.

I followed the setup for Android guide to the letter. This is in the output:

* What went wrong:
A problem occurred evaluating settings ''.
> java.io.IOException: The filename, directory name, or volume label syntax is incorrect

The guide says to just use Goog'es default setting/installation for Java, but could this be the problem, and how do I fix it?

I can place the full output if needed but I figured it was unnecessary since it "identified" the issue.