Having problem in opening one of the topics of Javascript

I am currently solving the JavaScript Algorithms and the Data Structures Certification but in the topic of the Basic JavaScript the subtopic Iterate with JavaScript While Loops is not opening rather it is showing errors while opening.
Can someone help me out for this ??

have you already tried that challenge? it may be you have an infinite loop on the editor that is breaking things when you try to open. Could you try clearing cache?