Fields disabled

Hi, I’m going crazy!!! This form is working:

<div class="one-half"><label> Vorname *
    [text* your-name] </label></div>

<div class="one-half last"><label> Nachname *
     [text* nachname] </label></div>

<div class="one-half"><label> Stra?e, Nr *
    [text* strasse]</label></div>

<div class="one-half last"><label> Plz, Ort
     [text* plzundort] </label></div>

<div class="one-half"><label>Ihre Email * [email* your-email]</label></div>

<div class="one-half last"><label>Telefon [tel tel-611]</label></div>
<label>[checkbox* beitrittsformular exclusive "Bitte schicken Sie mir ein Beitrittsformular per E-MAil zu."] </label>

[acceptance acceptance-674]Ja, ich stimme der <a href="https://www.mywebsite.de/datenschutzerklaerung/">Datenschutzerkl?rung</a> gem. DSGVO zu. [/acceptance]

[submit "Senden"]

And without the checkbox :
<label>[checkbox* beitrittsformular exclusive "Bitte schicken Sie mir ein Beitrittsformular per E-MAil zu."] </label>
I can’t write into the form.
What’s wrong with my code? It worked perfectly befor the update.
Now I’m using Version 5.1.7 ad WP version 5.4.1