Unable to upgrade Plesk or install extension: /usr/local/lib/libcurl.so.4: no version information available

Symptoms

• Unable to upgrade Plesk, the process fails with the error:

  Web server configuration is broken. We will try to repair it. This operation can take a lot of time, please do not interrupt the process.
  /usr/bin/sw-engine: /usr/local/lib/libcurl.so.4: no version information available (required by  /usr/bin/sw-engine)

• The execution of the plesk login command fails with the same error message.

• The Plesk GUI can be inaccessible with the following error message:

  PHP Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0
  PHP Fatal error: Unknown: Failed opening required 'auth.php' (include_path='/opt/psa/admin/plib') in Unknown on line 0

• Cannot install SOGo webmail extension:

  The ‘SOGo Webmail’ extension could not be installed. Error in cURL request: Protocol ‘https’ not supported or disabled in libcurl

• Unable to install/renew the Plesk license with the next error:

  Could not update the license. Make sure that connections to the license server ka.plesk.com on TCP port 443 are not blocked

Cause

Multiple versions of libcurl are installed on the server and Plesk is using the incorrect version.

Resolution

1. Log into the server via SSH.

2. Excute the command below to remove the symlink for incorrect libcurl version( that is specified in the error):

   # unlink /usr/local/lib/libcurl.so.4