Test Site Theme Error

I have uploaded the theme Lifeline 2 to a test site for my client. Once I have uploaded the theme I am getting this error message when trying to activate any theme: Parse error: syntax error, unexpected T_STRING, expecting T_CONSTANT_ENCAPSED_STRING or ‘(’ in /home/content/51/8031551/html/2017_redesign/wp-content/themes/lifeline2/core/application/classes/common.php on line 3


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