Installing Plesk 18.0.59 or updating to this version fails

Symptoms

• An attempt to install or update to Plesk Obsidian 18.0.59 is performed on a Linux-based operating system
• The Plesk installer output shows errors that are similar to the following:
  RHEL-based systems:

  Download Extra Packages for Enterprise Linux 8 - x86_64 34368B [total 0/unknown B 1/1 files]
  Failed to install {'name': 'plesk-php81-pear', 'arch': 'noarch', 'version': '1.10.13', 'release': '0redhat.8.231228.1347'}:
  Error while downloading packages metainfo: No match for argument: plesk-php81-pear-1.10.13-0redhat.8.231228.1347.noarch. Trying again.
  Failed to install {'name': 'plesk-php81-pear', 'arch': 'noarch', 'version': '1.10.13', 'release': '0redhat.8.231228.1347'}:
  Error while downloading packages metainfo: No match for argument: plesk-php81-pear-1.10.13-0redhat.8.231228.1347.noarch. Trying again.
  Failed to install {'name': 'plesk-php81-pear', 'arch': 'noarch', 'version': '1.10.13', 'release': '0redhat.8.231228.1347'}:
  Number of retries is exceeded.
  dnf.exceptions.PackageNotFoundError: No match for argument: plesk-php81-pear-1.10.13-0redhat.8.231228.1347.noarch

  Debian-based systems:

  Execution failed with exit code 1.
  stdout:
  ERROR: The required version '3.58.0' was not found on the server.
  This could happen because of configuration error at the installation source.
  The MD5 checksum of the /var/cache/parallels_installer/parallels_installer_Ubuntu_18.04_x86_64_3.58.0.tmp file does not match the value specified in the configuration file. Expected: 213480b0b2c459c964a9e98e36199816, actual: 743e2c6f9e4e07952ad4f69f3c11791a.
  Not all packages were installed.
  Please resolve this issue and try to install the packages again.
  Visit https://support.plesk.com/ to search for a solution.

  Err:19 http://autoinstall.plesk.com/PHP81_17 focal/all amd64 Packages
  File has unexpected size (9083 != 9064). Mirror sync in progress? [IP: 203.0.113.2 80]
  Hashes of expected file:
  - Filesize:9064 [weak]
  - SHA512:e982d58f0f73fd8fe86895ef66a56dab50db07042514a647f4e92470e3f6c196fcca8f4f1b0506e22154e9db9dd7f527a9864de2580659ded3afcab4c6909848
  - SHA256:029a0a146e7761c754c6985222ef7a9577c7d39fc6aa74fd17c73ae2efce022e
  - SHA1:e7293c458d3ae9977b4bb071761f8055c9b7d158 [weak]
  - MD5Sum:c080b2aa10e220a93dc6d7c95174ef0d [weak]
  Release file created at: Tue, 02 Jan 2024 07:46:50 +0000
  Fetched 3885 B in 1s (2917 B/s)
  Reading package lists...
  E: Failed to fetch http://autoinstall.plesk.com/PHP81_17/dists/focal/all/binary-amd64/Packages.bz2 File has unexpected size (9083 != 9064). Mirror sync in progress? [IP: 203.0.113.2 80]
  Hashes of expected file:
  - Filesize:9064 [weak]
  - SHA512:e982d58f0f73fd8fe86895ef66a56dab50db07042514a647f4e92470e3f6c196fcca8f4f1b0506e22154e9db9dd7f527a9864de2580659ded3afcab4c6909848
  - SHA256:029a0a146e7761c754c6985222ef7a9577c7d39fc6aa74fd17c73ae2efce022e
  - SHA1:e7293c458d3ae9977b4bb071761f8055c9b7d158 [weak]
  - MD5Sum:c080b2aa10e220a93dc6d7c95174ef0d [weak]
  Release file created at: Tue, 02 Jan 2024 07:46:50 +0000
  E: Some index files failed to download. They have been ignored, or old ones used instead.
  Warning: there are errors in 'apt-get update'
  Detecting installed product components.

Cause

On 21 Feb 2024, issues with the official…