After installing a plugin if an error occurs follow the steps:
*Check the wordpress configuration File(wp-config.php)
*Check for the debug mode. Initially the debug mode will be set to "false".
*Set it to "true" and work on the problem.
*You will find the exact error file and file path.
*Rectify the error by removing or renaming or disabling according to the problem.
*Once the problem is fixed. Change the debug mode to "false".
(Leaving the debug mode true is not recommended)