Error afer hitting next button in design design

Hello,

as I mentioned in the subject, when I hit “next” button in design view, first blank page displays only with WordPress menus, when I hit reload I got the following error message:

The application Unknown application/component encountered an error

Please report the following error to MailPoet support

TypeError: parseFloat is not a function. (In 'parseFloat(e)', 'parseFloat' is an instance of Object) 

File name: No fileName reported 

Stack trace: t@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:52834

e@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:52641

scrollboxSize@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:53260

set@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:56728

style@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:56159

B@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:32628

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2550946

o@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2549626

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2561839

each@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:3007

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2561797

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:536570

componentDidMount@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:538287

mc@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2273506

hc@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2273266

bc@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2272804

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2284584

Ml@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2285093

il@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2278851

il@[native code]

Fo@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2219621

Jc@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2275749

enqueueSetState@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2226591

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2405400

@https://thetapetrip.com/wp-content/plugins/mailpoet/assets/dist/js/admin.js:2:167170

c@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:28452

fireWith@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:29193

@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:31093

e@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:30163

@https://c0.wp.com/c/6.2.2/wp-includes/js/jquery/jquery.min.js:2:30461

Best, Daniel