Hi
I think the reason is because your site template has some css code for info class. Please follow the instructions below to get the issue sorted :
1. Open the file components/com_pmform/views/confirmation/tmpl/default.php
2. Find the code below :
Code:
<p class="info"><?php echo $message ; ?></p>
3. Change it to:
Code:
<p><?php echo $message ; ?></p>
After that, the issue should be fixed.
Tuan