After Php 8.3 Update from 7.4, Page is broken

Hello,

We changed the php version in our dev system from 7.4 to 8.3 and discovered that the product detail page is no longer complete. Unfortunately, no errors are displayed in the console and none can be seen in debug mode. Have you already noticed a problem like this with php 8.3, is there an adjustment we can make to fix the error? We have installed the following version 3.4.5.

Live URL: https://www.revisionsklappen.com/produkte/revisionsklappe-revisionstuer-brandschutzklappe-brandschutztuer/aluplana-revisionsklappe-spachtelfrei/

DEV with PHP 8.3: https://wordpress.p669317.webspaceconfig.de/produkte/revisionsklappe-revisionstuer-brandschutzklappe-brandschutztuer/aluplana-revisionsklappe-spachtelfrei/

After deactivating the plugin, the normal content is displayed again.

Thanks and BR

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