Error when executing plesk login: ioncube_loader_lin_5.6.so: undefined symbol: zend_error_c

Symptoms

Error is shown when command # plesk login is executed:

CONFIG_TEXT: Failed loading /usr/lib64/php/modules/sw-engine/ioncube_loader_lin_5.6.so: /usr/lib64/php/modules/sw-engine/ioncube_loader_lin_5.6.so: undefined symbol: zend_error_cb

Cause

Corrupted file /usr/lib64/php/modules/sw-engine/ioncube_loader_lin_5.6.so

Resolution

Replace the corupted file:

1. Access the server via SSH .
2. Create a directory for the package:
   

   # mkdir package
   # cd package

3. Download the necessary package, unpack it, backup the original file and replace it:
   For CentOS 7
   

   # wget http://autoinstall.plesk.com/PSA_17.5.3/dist-rpm-CentOS-7-x86_64/engine/sw-engine-2.22.3-centos7.201709121113.x86_64.rpm

   # rpm2cpio sw-engine-2.22.3-centos7.201709121113.x86_64.rpm | cpio -idmv

   # cp -a /usr/lib64/php/modules/sw-engine/ioncube_loader_lin_5.6.so /root/

   # mv /root/package/usr/lib64/php/modules/sw-engine/ioncube_loader_lin_5.6.so /usr/lib64/php/modules/sw-engine/

   For Ubuntu 16
   

   # wget http://autoinstall.plesk.com/PSA_17.5.3/dist-deb-Ubuntu-16.04-x86_64/engine/sw-engine_2.22.3-ubuntu1604.201709121114_amd64.deb

   # dpkg-deb -R sw-engine_2.22.3-ubuntu1604.201709121114_amd64.deb ./

   # cp -a /usr/lib/x86_64-linux-gnu/php/modules/sw-engine/ioncube_loader_lin_5.6.so /root/

   # mv /root/package/usr/lib/x86_64-linux-gnu/php/modules/sw-engine/ioncube_loader_lin_5.6.so /usr/lib/x86_64-linux-gnu/php/modules/sw-engine/

   For Debian 8
   

   # wget http://autoinstall.plesk.com/PSA_17.5.3/dist-deb-Debian-8.0-x86_64/engine/sw-engine_2.22.3-debian80.201709121116_amd64.deb

   # dpkg-deb -R sw-engine_2.22.3-debian80.201709121116_amd64.deb ./

   # cp -a /usr/lib/x86_64-linux-gnu/php/modules/sw-engine/ioncube_loader_lin_5.6.so /root/

   # mv /root/package/usr/lib/x86_64-linux-gnu/php/modules/sw-engine/ioncube_loader_lin_5.6.so /usr/lib/x86_64-linux-gnu/php/modules/sw-engine/