Can't download regression tests

GROMACS version: 2020.2
GROMACS modification: No
I have a huge problem. I can’t download regression tests. First I tried to install gromacs 2020.2. And when I wrote on a terminal:
cmake … -DGMX_BUILD_OWN_FFTW=ON -DREGRESSIONTEST_DOWNLOAD=ON
and hit enter then I got:

Make Error at tests/CMakeLists.txt:57 (message):
  error: downloading
  'http://gerrit.gromacs.org/download/regressiontests-2020.2.tar.gz' failed

  status_code: 22

  status_string: "HTTP response code said error"

  log: Trying 130.237.11.134:80...

  Connected to gerrit.gromacs.org (130.237.11.134) port 80 (#0)

  GET /download/regressiontests-2020.2.tar.gz HTTP/1.1

  Host: gerrit.gromacs.org

  User-Agent: curl/7.79.1

  Accept: */*

  

  Mark bundle as not supporting multiuse

  HTTP/1.1 301 Moved Permanently

  Server: nginx/1.18.0 (Ubuntu)

  Date: Mon, 07 Feb 2022 18:22:46 GMT

  Content-Type: text/html

  Content-Length: 178

  Connection: keep-alive

  Location:
  https://gerrit.gromacs.org/download/regressiontests-2020.2.tar.gz

  

  Ignoring the response-body

  [178 bytes data]

  Connection #0 to host gerrit.gromacs.org left intact

  Issue another request to this URL:
  'https://gerrit.gromacs.org/download/regressiontests-2020.2.tar.gz'

    Trying 130.237.11.134:443...

  Connected to gerrit.gromacs.org (130.237.11.134) port 443 (#1)

  ALPN, offering h2

  ALPN, offering http/1.1

  successfully set certificate verify locations:

   CAfile: /etc/ssl/certs/ca-certificates.crt
   CApath: /etc/ssl/certs

  [5 bytes data]

  TLSv1.3 (OUT), TLS handshake, Client hello (1):

  [512 bytes data]

  [5 bytes data]

  TLSv1.3 (IN), TLS handshake, Server hello (2):

  [122 bytes data]

  [5 bytes data]

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):

  [25 bytes data]

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (IN), TLS handshake, Certificate (11):

  [4069 bytes data]

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (IN), TLS handshake, CERT verify (15):

  [264 bytes data]

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (IN), TLS handshake, Finished (20):

  [52 bytes data]

  [5 bytes data]

  TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):

  [1 bytes data]

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (OUT), TLS handshake, Finished (20):

  [52 bytes data]

  SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384

  ALPN, server accepted to use http/1.1

  Server certificate:

   subject: CN=gerrit.gromacs.org
   start date: Nov 24 19:20:23 2021 GMT
   expire date: Feb 22 19:20:22 2022 GMT
   subjectAltName: host "gerrit.gromacs.org" matched cert's "gerrit.gromacs.org"
   issuer: C=US; O=Let's Encrypt; CN=R3
   SSL certificate verify ok.

  [5 bytes data]

  [1 bytes data]

  GET /download/regressiontests-2020.2.tar.gz HTTP/1.1

  Host: gerrit.gromacs.org

  User-Agent: curl/7.79.1

  Accept: */*

  

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):

  [281 bytes data]

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):

  [281 bytes data]

  old SSL session ID is stale, removing

  [5 bytes data]

  [1 bytes data]

  Mark bundle as not supporting multiuse

  HTTP/1.1 502 Bad Gateway

  Server: nginx/1.18.0 (Ubuntu)

  Date: Mon, 07 Feb 2022 18:22:49 GMT

  Content-Type: text/html

  Content-Length: 166

  Connection: keep-alive

  The requested URL returned error: 502

  Closing connection 1

  [5 bytes data]

  [1 bytes data]

  TLSv1.3 (OUT), TLS alert, close notify (256):

  [2 bytes data]



-- Configuring incomplete, errors occurred!
See also "/home/jakub/gromacs-2020.2/build/CMakeFiles/CMakeOutput.log".
See also "/home/jakub/gromacs-2020.2/build/CMakeFiles/CMakeError.log".

I try to download it manually from here: Downloads — GROMACS 2020.2 documentation
but when I clicked to download I got

502 Bad Gateway

nginx/1.18.0 (Ubuntu)

I don’t know is something wrong with my computer or maybe the problem is on a server?

If any of you will have such a problem, I found a solution:
I use this guide:

I just download regression tests from here Index of /regressiontests then unpack them in my gromacs folder
and then I instead of this command
cmake .. -DGMX_BUILD_OWN_FFTW=ON -DREGRESSIONTEST_DOWNLOAD=ON
I use this command
cmake .. -DGMX_BUILD_OWN_FFTW=ON -DREGRESSIONTEST_DOWNLOAD=OFF -DREGRESSIONTEST_PATH=../regressiontests-2020.2
and it is working