Photo Gallery incompatible

I’am using Photo Gallery by Supsystic version 1.83 and Contactform 7 4.2.2.
I think this problem started after installing the latest version of PHoto Gallery.

When I try to submit a form in contactform 7 in combination with an activated Photo Gallery. The Submit button stays in a refresh status and does noet response.
When you look into the debugger you see the response coming from the server :

{"mailSent":false,"into":"#wpcf7-f59-p18-o1","captcha":null,"message":"Een of meer velden bevatten een
 fout. Graag corrigeren en opnieuw proberen.","invalids":[{"into":"span.wpcf7-form-control-wrap.your-name"
,"message":"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Aankomstdatum"
,"message":"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Vertrekdatum"
,"message":"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.straat","message"
:"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Huisnummer","message":"Het
 veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.postcode","message":"Het veld
 is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Woonplaats","message":"Het veld is
 verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.your-email","message":"Het veld is verplicht
.","idref":null}]}<link rel='stylesheet' id='sbc-css'  href='http://piekoobelloo.nl/wp-content/plugins
/wp-simple-booking-calendar/css/sbc.css?ver=4.5.2' type='text/css' media='all' />
<script type='text/javascript' src='http://piekoobelloo.nl/wp-includes/js/jquery/jquery.js?ver=1.12.3'
></script>
<script type='text/javascript' src='http://piekoobelloo.nl/wp-includes/js/jquery/jquery-migrate.min.js
?ver=1.4.0'></script>
<script type='text/javascript' src='http://piekoobelloo.nl/wp-content/plugins/wp-simple-booking-calendar
/js/sbc.js?ver=4.5.2'></script>

You see the html should not be there.
Normal situation photo gallery not activated:

{"mailSent":false,"into":"#wpcf7-f59-p18-o1","captcha":null,"message":"Een of meer velden bevatten een
 fout. Graag corrigeren en opnieuw proberen.","invalids":[{"into":"span.wpcf7-form-control-wrap.your-name"
,"message":"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Aankomstdatum"
,"message":"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Vertrekdatum"
,"message":"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.straat","message"
:"Het veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Huisnummer","message":"Het
 veld is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.postcode","message":"Het veld
 is verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.Woonplaats","message":"Het veld is
 verplicht.","idref":null},{"into":"span.wpcf7-form-control-wrap.your-email","message":"Het veld is verplicht
.","idref":null}]}