Download of FPGA tutorials fails

Hi. I tried again, also with another browser (CHromium instead of Firefox). No changes. I downloaded the previous versions last year, but this time nothing works ...

Accessing

https://fpgauniversity.intel.com/redirect/materials?id=/pub/Intel_Material/18.0/Tutorials/Getting_Started_with_DE-series_boards.pdf

just results in the bad gateway error.

Andreas