Getting error after update

Plugin could not be activated because it triggered a fatal error.

Fatal error: Uncaught Error: Call to a member function get_section() on null in public_html/wp-content/plugins/my-custom-functions/inc/php/functional.php(103) : eval()’d code:2 Stack trace: #0 public_html/wp-content/plugins/my-custom-functions/inc/php/functional.php(103): eval() #1 public_html/wp-content/plugins/my-custom-functions/inc/php/functional.php(114): spacexchimp_p001_exec() #2 public_html/wp-content/plugins/my-custom-functions/my-custom-functions.php(102): require_once(‘/home/…’) #3 public_html/wp-admin/includes/plugin.php(2299): include(‘/home/u41301261…’) #4 public_html/wp-admin/plugins.php(191): plugin_sandbox_scrape(Array) #5 {main} thrown in public_html/wp-content/plugins/my-custom-functions/inc/php/functional.php(103) : eval()’d code on line 2