frontpage form routed to 404

hi, i have two forms on my website. On the start page and on a subpage.
The form on the subpage works very well, but on the start page it leads to a 404 page.
I then copied the form from the subpage and placed it on the start page, where it also leads to a 404 page.
I'm really at a loss
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site link:
Site
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regards
Jochen

Hi jochen,
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The form action URL is missing the domain name - it is just /index.php?option=com_chronoforms6&chronoform=kontakt&event=submit and needs to be https://www.campercruise.de/index.php?option=com_chronoforms6&chronoform=kontakt&event=submit
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Bob

hi Bob,
and how can i fix this?
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regards
Jochen

Hi Jochen,
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Yes, it returns this error:

DOMXPath::query(): Invalid expression in selector >> body << in /kunden/185608_63628/webseiten/womo-cruise.de/libraries/cegcore2/vendors/emogrifier/Emogrifier.php on line 371

Please disable the Advanced Template Parsing setting in the form email settings!
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For future forms you better use v7
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Best regards