Hi there,
First of all, there is a problem on your website which is causing this issue:

That is originated from this code:

If you added this code in the Javascript Customizer code you need to remove the <script type="text/javascript"> and </script> part as the section you added the code already wraps the code with those tags.
Regarding the date for the schema I see only this in the code:

I am not sure how you set the schema but the only snippet I see in the code which had a date is the ones related to videos and the uploadDate is the section that is available.
If I am looking into incorrect place kindly get back to us with detailed information on how you set the snippet and explain the steps.
Thank you.