503 Proxy Target Missing

When I try to go into the r4ds tutorials in the R Notebook, I get this error:

this appears whenever I try to get into the r4ds or the r4ds2 files.

Thank you for the heads up @madisonishigaki @aqcousineau! The issue should be resolved so please try again and let us know if you are able to access the r4ds/r4ds2 tutorials.

For reference, SciServer was under a heavy load that caused the tutorials to “time out” when attempting to start. The great backend team has cleared it out but definitely let us know if you encounter this or any other problems.