ERROR - 2017-09-27 09:40:50 --> Severity: Warning --> mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given /opt/lampp/htdocs/27sept/siddharth_application/system/database/drivers/mysqli/mysqli_result.php 38 ERROR - 2017-09-27 09:40:57 --> Severity: Warning --> DOMXPath::query(): Invalid expression /opt/lampp/htdocs/27sept/siddharth_application/application/third_party/dompdf/include/stylesheet.cls.php 697 ERROR - 2017-09-27 09:40:57 --> Severity: Warning --> DOMXPath::query(): Invalid expression /opt/lampp/htdocs/27sept/siddharth_application/application/third_party/dompdf/include/stylesheet.cls.php 697 ERROR - 2017-09-27 09:41:09 --> Severity: Warning --> DOMXPath::query(): Invalid expression /opt/lampp/htdocs/27sept/siddharth_application/application/third_party/dompdf/include/stylesheet.cls.php 697 ERROR - 2017-09-27 09:41:09 --> Severity: Warning --> DOMXPath::query(): Invalid expression /opt/lampp/htdocs/27sept/siddharth_application/application/third_party/dompdf/include/stylesheet.cls.php 697