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Problem:
If you're experiencing a Forbidden error when saving a translation of a custom post type created with Toolset, and this issue only occurs with specific translations, it might be due to a corrupted post ID.
Solution:
We recommend trying the following steps:
1. Navigate to the problematic post in your WordPress dashboard.
2. Use the 'duplicate this' option to create a copy of the post. This action should tag the new post with 'WPML' at the end of its name.
3. Add the translation to the newly duplicated post.
Alternatively, you could delete the original post and assign the new duplicated post to that URL as a workaround.
If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If problems persist, please open a new support ticket at WPML support forum.