Hi,
a quick fix for this would be the following.
Navigate to wp-content/plugins/terra-themes-tools/inc/slider/terra-themes-slider.php
.
Find the two lines that say
$output .= '<' . $text_tag . ' class="header-image-text">' . esc_html($text) . '</' . $text_tag . '>';
and change it to
$output .= '<' . $text_tag . ' class="header-image-text">' . wp_kses_post($text) . '</' . $text_tag . '>';
.
The lines should be 129 and 175.
Then navigate to wp-content/plugins/terra-themes-tools/inc/metaboxes/slides-metabox.php
.
Find the line with
$text = isset( $_POST['terra_themes_tools_text'] ) ? sanitize_text_field($_POST['terra_themes_tools_text']) : false;
and change it to
$text = isset( $_POST['terra_themes_tools_text'] ) ? wp_kses_post($_POST['terra_themes_tools_text']) : false;
.
This should do the trick. However, be aware that you will lose this change when you update or reinstall the plugin.
Please tell me whether this solves your issue.