PHP Errors

Gettting loads of errors on WP 5.2.2.

Headers already sent on activation.

Once activated I’m getting the following error when trying to delete any plugin from the plugins page:

PHP Fatal error:  Uncaught Error: Call to undefined function auth_redirect() in /var/www/.../public_html/wp-admin/admin.php:93
Stack trace:
#0 /var/www/.../public_html/wp-admin/update.php(14): require_once()
#1 /var/www/.../public_html/wp-content/plugins/team-members-blocks/core/init.php(32): require_once('/var/www/....')
#2 /var/www/.../public_html/wp-content/plugins/team-members-blocks/core/init.php(7): TFTeamBlocks\Core\Init->includes()
#3 /var/www/.../public_html/wp-content/plugins/team-members-blocks/team-blocks.php(22): TFTeamBlocks\Core\Init->__construct()
#4 /var/www/.../public_html/wp-settings.php(362): include_once('/var/www/....')
#5 /var/www/.../public_html/wp-config.php(103): require_once('/var/www/....')
#6 /var/www/.../public_html/wp-load.php(37): require_once('/var/www/....')
#7 /var/www/.../public_html/wp-admin/admin-ajax.php(22): require_once('/var/www/....')
#8 {main}
  thrown in /var/www/.../public_html/wp-admin/admin.php on line 93

Poor start for this plugin!