I don’t know how to fix this, but I’ve found a work-around. I have the same problem, but this method seems to do the trick for now. Atleast your galleries are showing and you don’t receive that annoying text:
[album id=”x” template=””]
Though this fix seems to show the galleries which you modify manually on each gallery page you enter. For the galleries which show the annoying text as above, insert this and modify.
<div class="ngg-albumoverview">
<!-- List of galleries -->
<div class="ngg-album">
<div class="ngg-albumtitle"><a href="/?page_id=10&album=2&gallery=2">Galleryname</a></div>
<div class="ngg-albumcontent">
<div class="ngg-thumbnail">
<a href="/?page_id=10&album=2&gallery=2"><img class="Thumb" alt="alternate text" src="https://yourwebsite.com/wp-content/gallery/albumname/thumbs/thumbs_image_name.jpg"/></a>
</div>
<div class="ngg-description">
<p>album description</p>
<p><strong>10</strong> Photos</p>
</div>
</div>
</div>
<!-- Pagination -->
<div class="ngg-clear"> </div>
</div>
Hope it helps. ??