Blank screen when reviewing a Toolset archive for a category

Overview of the issue

When using WPML’s Translate Everything feature with the Review before publishing option selected and Toolset Blocks, if you assign a Toolset archive to a specific category, whenever you go to WPML → Translations to review that archive translation, you see a blank page.

Workaround

1. Go to WPML → Translations.
2. Select your archive translation.
3. Click on the Bulk actions dropdown.
4. Select the Approve translations review option and apply it.