Slideshow.php line 76: Uncaught TypeError

We have has an issue with an old site that has recently been upgraded to PHP8.2. If gallery_height in the shortcode is set to “auto” the page exits with a fatal error. This appears to be a backwards compatibility issue..

PHP message: PHP Fatal error: Uncaught TypeError: Unsupported operand types: string / string in …/nextgen-gallery/src/DisplayTypes/Slideshow.php:76

Reproducible when the short code is written like this:
[ngg src=”galleries” ids=”34″ display=”basic_slideshow” gallery_width=”800″ gallery_height=”auto” show_thumbnail_link=”0″]