Failed loading /opt/ioncube/[ioncube_loader_lin_7.1.so

Getting this in my cron job email reports. I think it’s a PHP configuration thing. Anyone recognize this error?

Failed loading /opt/ioncube/ioncube_loader_lin_7.1.so: /opt/ioncube/ioncube_loader_lin_7.1.so: undefined symbol: _zval_ptr_dtor
No input file specified.