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Gromacs Error – log: Protocol “https” not supported or disabled in libcurl


Downloading: https://ftp.gromacs.org/regressiontests/regressiontests-2020.6.tar.gz
CMake Error at tests/CMakeLists.txt:58 (message):
  error: downloading
  'https://ftp.gromacs.org/regressiontests/regressiontests-2020.6.tar.gz'
  failed

  status_code: 1

  status_string: "Unsupported protocol"

  log: Protocol "https" not supported or disabled in libcurl

  Closing connection -1

If you compiling Gromacs-2020.6 with Plumed2-2.7.2, do follow the Regression Test Errors during Gromacs Compilation. The Key issues are 

DREGRESSIONTEST_DOWNLOAD=OFF -DREGRESSIONTEST_PATH=../regressiontests-2020.2

If you can download the regressiontests-2020.6.tar.gz and get the regressiontest PATH correct, it should work without issues.

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