PHP Fatal error on adding feed

[colmrs]

Fatal error: Uncaught TypeError: Argument 1 passed to CI_Exceptions::show_exception() must be an instance of Exception, instance of Error given, called in /var/www/readerself/system/core/Common.php on line 658 and defined in /var/www/readerself/system/core/Exceptions.php:190 Stack trace: #0 /var/www/readerself/system/core/Common.php(658): CI_Exceptions->show_exception(Object(Error)) #1 [internal function]: _exception_handler(Object(Error)) #2 {main} thrown in /var/www/readerself/system/core/Exceptions.php on line 190

Apache Version 2.4.18 PHP Version 7.0.15-0ubuntu0.16.04.4 MySQL Version 5.7.17

Any Help would be apprciated Cheers