Fatal Error after adding new forms

I’ve started to get the following error occasionally after adding a few new forms to my site:

Fatal error: Uncaught Error: Call to a member function get_error_messages() on array in /home/monstrar/public_html/wp-content/plugins/wd-manager/includes/class-wdd-api.php:56 Stack trace: #0 /home/monstrar/public_html/wp-content/plugins/wd-manager/includes/class-wdd-api.php(159): WDDApi->get_remote_data(‘wd-google-analy…’) #1 /home/monstrar/public_html/wp-content/plugins/wd-manager/class-wdd.php(35): WDDApi->get_products_data() #2 /home/monstrar/public_html/wp-content/plugins/wd-manager/class-wdd.php(75): WDD->__construct() #3 /home/monstrar/public_html/wp-content/plugins/wd-manager/wd-manager.php(100): WDD::get_instance(Array) #4 /home/monstrar/public_html/wp-content/plugins/wd-manager/wd-manager.php(82): wdd_init(Array) #5 /home/monstrar/public_html/wp-includes/class-wp-hook.php(286): wdd_init_manager_plugin(”) #6 /home/monstrar/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #7 /home/monstrar/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #8 /home/monstrar/publ in /home/monstrar/public_html/wp-content/plugins/wd-manager/includes/class-wdd-api.php on line 56

Note that the site is perfectly usable and functional, and the forms work fine even when I get this error, but I see this error from time to time when logging into the dashboard. If it helps with diagnosis, I have reused the same form on a few different pages on the site, and I embedded the forms using [Form id=”1″]

Thanks.