When logged in as instructor opening NBGrader > Formgrader gives
grader32.ewatercycle-nle.src.surf-hosted.nl refused to connect. in browser and
Refused to frame 'https://grader32.ewatercycle-nle.src.surf-hosted.nl/' because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'none'". in dev console.
When logged in as instructor opening NBGrader > Formgrader gives
grader32.ewatercycle-nle.src.surf-hosted.nl refused to connect.in browser andRefused to frame 'https://grader32.ewatercycle-nle.src.surf-hosted.nl/' because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'none'".in dev console.