Ruby file runs in Terminal but not RubyMine

Warning: I am new to Ruby, RubyMine and programming in general
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When I run the attached file in Terminal, it runs fine but when I use any of RubyMine's Run commands, I see this error:

-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)


How can I correct this?

Attachment(s):
Assignment_Find_Frequency_of_letters.rb.zip
1 comment
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First of all make sure that RubyMine uses right Ruby version. Open Preferences -> Languages & Frameworks -> Ruby SDK and Gems. Also the message you provided it is not an error, it is arguments of ruby. Output is that comes after that line

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