Hi cemsdb,
I can not access your backend, you can open the /templates/ja_colab/acm/hero/tmpl/style-2.php file and find line 20,
Replace this code:
<a class="nav-link <?php if ($i < 1) echo "active"; ?>" href="#mod-<?php echo $modId.$i ?>" role="tab"
data-toggle="tab">
With this code:
<a class="nav-link <?php if ($i < 1) echo "active"; ?>" data-bs-target="#mod-<?php echo $modId.$i ?>" role="tab"
data-bs-toggle="tab">
If you still face this issue, you can check the admin account and we will help you check and resolve it.