Error In the first lrequirement

Tell us what’s happening:
Describe your issue in detail here.
I have written the exact same code and run into my Compiler and it is all okay according to whatever I Have written but it is showing an error in the first statement.

Your code so far

const myStr = 'This is the start.' + 'This is the end.'; // Change this line


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Challenge: Concatenating Strings with Plus Operator

Link to the challenge:

Be sure to include a space between the two strings.