Hi
i hope this link will help you to move to a new server
Moving WordPress
1. I can see you’re using the Aweber form plugin, if you’re not using that plugin, you can disable it,
2. also clear cache if you’re using any cache plugin
3. if your using the Elementor plugin check the Elementor footer template if you have added any code in that
i think maybe it is due to jquery depreciation issue in wordpress 5.5
use this plugin https://en-gb.wordpress.org/plugins/enable-jquery-migrate-helper/
and comment if it works
