I completed week1 of course: “Improving Deep Neural Networks: Hyperparameter Tuning, Regularization and Optimization”. Unfortunately, i cannot upload the notebook for assignement 1 (initialization), 2 (Regularization) and 3 (Gradient Checking). The assignement take much time to upload, then it shows error : “This lab has failed to launch. Please wait a few minutes and try again”.
Any advice ?
Sorry, it looks like the Coursera server complex is having problems at the moment. Bad weather in the cloud 
. Best to chill for a while and check back later.
I am also experiencing a “loading forever” situation, the notebook is finally not opening. Not sure if it is a general issue for everybody or only for me.
FWIW I’ve also been seeing this for the last couple of hours as well. Spoken as of 02:40 UTC 4/21/2021.
Dear @ZINE and @paulinpaloalto things seems now back to normal here as of 04:27 UTC 