rutgerd-3

Problem:
When using custom permalink structure with custom code for a CPT UI post type the translated posts are not loading.

Solution:
WPML supports only custom slug translation and not custom permalink structure.
When you use CPT UI plugin for a custom permalink structure you can use Permalink Manager plugin as suggested in the plugin document linked next.

Relevant Documentation:
https://wpml.org/documentation/support/translating-slugs-for-custom-post-type-archives/
https://docs.pluginize.com/article/customizing-permalinks/