Programming Assignment: Week 2 practice lab: Linear regression

Sir , hello In the week i have faced an lot of issue in the working on this website . Sir one of them is that , i have my First programming assignment this week . but that lab is not opening in browser . And i have paste the screenshot of that issue also . i have tried to solve it by many method but it doesn’t get solved out from my side .
please Help me sir faster because the died line of my submission is 7AUG only .

Please check this out. If needed, contact coursera ASAP and tell them about your situation.