Fatal error: Uncaught Error: Class “WpssoOpmPost” not found with version 3.1.0

I got a fatal error after updating wpsso-organization-place to version 3.1.0 (with WordPress 6.6.1 and wpsso 18.6.0):

PHP Fatal error:  Uncaught Error: Class "WpssoOpmPost" not found in /home/blog/public_html/wp-content/plugins/wpsso-organization-place/wpsso-organization-place.php:86
Stack trace:
#0 /home/blog/public_html/wp-includes/class-wp-hook.php(322): WpssoOpm->init_objects_preloader()
#1 /home/blog/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#2 /home/blog/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#3 /home/blog/public_html/wp-content/plugins/wpsso/wpsso.php(440): do_action()
#4 /home/blog/public_html/wp-includes/class-wp-hook.php(324): Wpsso->set_objects()
#5 /home/blog/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#6 /home/blog/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#7 /home/blog/public_html/wp-settings.php(700): do_action()
#8 /home/blog/wp-config.php(119): require_once('...')
#9 /home/blog/public_html/wp-load.php(55): require_once('...')
#10 /home/blog/public_html/wp-blog-header.php(13): require_once('...')
#11 /home/blog/public_html/index.php(17): require('...')
#12 {main}
  thrown in /home/blog/public_html/wp-content/plugins/wpsso-organization-place/wpsso-organization-place.php on line 86

I think it’s related to this change introduced in 3.1.0:

Changed the main instantiation action hook from ‘init_objects’ to ‘init_objects_preloader’.

Suffice to say, this broke my site and likely warrants an urgent bugfix. I had to rename the plugin folder to get it working again (wp-cli was unusable).

Please let me know if you need additional information.