Fatal Error When Caxton is Activated

Hi,

I need help to understand while I am getting a fatal error when I activate Caxton.

Here is the message I get:

Fatal error: Uncaught TypeError: Argument 1 passed to Freemius::get_api_user_scope_by_user() must be an instance of FS_User, boolean given, called in /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php on line 20787 and defined in /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php:20801 Stack trace: #0 /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php(20787): Freemius->get_api_user_scope_by_user(false) #1 /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php(20826): Freemius->get_api_user_scope(false) #2 /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php(18016): Freemius->get_current_or_network_user_api_scope() #3 /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php(10797): Freemius->_fetch_plugin_plans() #4 /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class in /home/fruitfu1/public_html/wp-content/plugins/caxton/inc/wp-sdk/includes/class-freemius.php on line 20801

I am most grateful if anyone can help. Thank you.