[Resolved] When I clicked on translate, the open page crashed

Hello there,

Welcome to WPML support. I'd be happy to help you with this issue.

Can you try the solution from here and see if this helps? https://wpml.org/errata/uncaught-invalidargumentexception-item-should-be-a-collection-or-an-array-or-an-object/

Further, If you disable all non-related WPML plugins, switch to one of default themes, the problem persists or not?

NOTE:
+ Make a backup (both files and database) for your site before updating/proceeding anything (Always a good practice!).

If none of the above helps, To debug this issue further, I would need to check your site settings once, for this I would need temporary access (wp-admin and ftp) to your site.

So could you please provide me with those details, you will find the needed fields for this below the comment area when you log in to leave your next reply.
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This info is private and available to you and WPML supporters only.
Read more about this: https://wpml.org/purchase/support-policy/privacy-and-security-when-providing-debug-information-for-support/

Note:
Backup your sites before providing the credentials or if possible provide credentials for the test site

Look forward to your reply.

Thanks