Compile Error: Can't find project or library

Hi Everyone,

I was using one add-in which will pull the data's from Quality center to Excel sheet.

Add-In was working fine last month. Today when i tried to use the add-in I am getting the following error in one of the line in code.

"Compile Error: Can't find project or library"

marked the error part in red.

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I did some google search and came to knw this is due to a recent update by microsoft.
But none of the solutions was helpful. I dont have any missing reference checked.
Please find the attached screenshot of reference
reference.JPG

Please help me. Thanks in advance