First, the lab environment took a long time to load. But once the files are visible in the directory, the file named C2_W1_Lab_1_SQL.ipynb is not opening. The error message says Unknown extension vscode.ipynb. Can anyone please help?
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Mine worked after I opened the lab the next day. The same problem happens in other practice labs, and the same fix (or waiting) works for me so far.
Try using a different browser. I have same issue in Chrome(Mac) but works better in Safari. Also, try clearing cache before loading up the lab session.