CSS not working for views

I updated MetaBox this morning (using AIO), and the CSS for MB Views is not working. This is true for all of my MB Views - below is an example. They were all working perfectly before updating.

The only other plugin I updated this morning was WooCommerce to v 6.0.

Any ideas?

--

One of my MB Views - they are all rendered via shortcode. The html is all correct but no CSS is applied:

Here's the HTML:

{% set relationship = attribute( relationships, 'course-products-to-instructors-woo' ) %}
{% for post in relationship.to %}

<div class="row">
  <div class="column1">
    <img src="{{ post.thumbnail.thumbnail.url }}" width="150px" height="150px" />
    </div>
  <div class="column2">

    <h2>
        {{ post.title }}</h2>
</div>

</div>

<p>
    {{ post.excerpt }}</p>
<a href="{{ post.url }}" target="blank" rel="noopener"> <span style="font-size:0.8rem;">See full profile →</span></a>

{% endfor %}

And the related CSS:

.row {
  display: flex;
  align-items: center;
  justify-content: center;
}

.column1 {
  flex: 50%;
}

.column2{
    padding-left:0.5rem;
}

/* Responsive layout - when the screen is less than 600px wide, make the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
  .column {
    width: 100%;
  }
}

.h3-instructor{
    color:#21272A; font-size:2rem !important;
}