Errors when adding woo products

Hello,

we are getting the following errors in browser preview of emails in automated woo emails when adding products to content. In test email also there are no woo products to see.

Warning: count(): Parameter must be an array or an object that implements Countable in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Blocks/Renderer.php on line 80

Warning: Invalid argument supplied for foreach() in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Blocks/Renderer.php on line 85

Warning: count(): Parameter must be an array or an object that implements Countable in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Columns/Renderer.php on line 13

Warning: count(): Parameter must be an array or an object that implements Countable in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Columns/Renderer.php on line 53

Warning: count(): Parameter must be an array or an object that implements Countable in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Blocks/Renderer.php on line 80

Warning: Invalid argument supplied for foreach() in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Blocks/Renderer.php on line 85

Warning: count(): Parameter must be an array or an object that implements Countable in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Columns/Renderer.php on line 13

Warning: count(): Parameter must be an array or an object that implements Countable in /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Columns/Renderer.php on line 53

Warning: Cannot modify header information – headers already sent by (output started at /…/wp-content/plugins/mailpoet/lib/Newsletter/Renderer/Blocks/Renderer.php:80) in /…/wp-content/plugins/mailpoet/lib/Router/Endpoints/ViewInBrowser.php on line 38

Any help?