From the screenshot, a valid URL is given from the luminus gradebook page; however, the link is flagged as an invalid link. Perhaps the link might be inaccessible to people without luminus accounts, but the error message should not display that the URL is invalid.
From the screenshot, a valid URL is given from the luminus gradebook page; however, the link is flagged as an invalid link. Perhaps the link might be inaccessible to people without luminus accounts, but the error message should not display that the URL is invalid.![Screen Shot 2021-04-16 at 4.31.13 PM.png](https://raw.githubusercontent.com/nus-cs2113-AY2021S2/pe/main/files/c0885e25-4c88-41dd-be28-60abc52bc21d.png)
[original: nus-cs2113-AY2021S2/pe-interim#1380] [original labels: severity.Low type.FunctionalityBug]