PHP DOING_AUTOSAVE Error

My hosting environment recently upgraded from PHP 7.4 to PHP 8.0 and now I am getting an error when attempting edit any of my Static Blocks. Is there an update or a fix for this? Thanks

Error Details
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An error of type E_ERROR was caused in line 195 of the file /nas/content/live/XXXXX/wp-content/plugins/static-block/static-block.php. Error message: Uncaught Error: Undefined constant "DOING_AUTOSAVE" in /nas/content/live/XXXXXX/wp-content/plugins/static-block/static-block.php:195
Stack trace:
#0 /nas/content/live/XXXXXX/wp-includes/class-wp-hook.php(309): static_block_meta_save(3155)
#1 /nas/content/live/XXXXXX/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#2 /nas/content/live/XXXXXX/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#3 /nas/content/live/XXXXXX/wp-includes/post.php(4686): do_action('save_post', 3155, Object(WP_Post), true)
#4 /nas/content/live/XXXXXX/wp-includes/post.php(4788): wp_insert_post(Array, false, true)
#5 /nas/content/live/XXXXXX/wp-admin/includes/post.php(426): wp_update_post(Array)
#6 /nas/content/live/XXXXXX/wp-admin/post.php(227): edit_post()
#7 {main}
  thrown