Content Encoding Error

In trying to download the check sum for the latest GNU MPFR version 4.2.2 gzipped tarball, a “Content Encoding Error” is thrown for the webpage https://www.mpfr.org/mpfr-current/mpfr-4.2.2.tar.gz.asc. This should NOT be happening. Can someone please look into this? I need to verify the bit integrity of the tarball file.