FATAL ERROR: 0 

Message: Argument 1 passed to BrushUser::upgrade() must be of the type int, string given, called in /home/bookbrush/webapps/staging/wp-content/themes/harmony-child-theme/page-upgrade-account.php on line 12 
Line No: 352 of /home/bookbrush/webapps/staging/custom-code/core/user/BrushUser.php



TypeError: Argument 1 passed to BrushUser::upgrade() must be of the type int, string given, called in /home/bookbrush/webapps/staging/wp-content/themes/harmony-child-theme/page-upgrade-account.php on line 12
 at BrushUser.upgrade(BrushUser.php:352)
 at include(page-upgrade-account.php:12)
 at require_once(template-loader.php:106)
 at require(wp-blog-header.php:19)
 at (main)(index.php:17)



HTTP Response code: 500