Error with HTML code

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1

I pasted a HTML code from an affiliated site and I had this error message
Loading the code for the Partenaires page. To debug this code, open c1o5.js in Developer Tools.
How can I access to developer Tools and debug this code?

2

Nothing happens with CTRL +Shift +C

3

Try the F12 key

4

@deleteduser I am on Windows, with F12 I have the Windows parameter

5

See this article for details.