[Closed] review process: Sorry, you are not allowed to preview drafts -> URL problem?

additional information that might be relevant:

1) hidden link does work for my editor, but still not for me or admin2. I get the same error as stated in ticket. Changing the URL manually to bootsmaklerei.de/.... still works and enables me to review the page. I did try it with my account on her device: no change, it does not work for me.
2) when visiting the english url boatmate.co.uk (frontend) directly I get redirect to bootskaufberatung.de (German page). When then clicking on english in the language switcher it brings me back to boatmate.co.uk which then remains english as it should. I don't think this is intended behaviour? Maybe it points to some misconfiguration related to our main ticket?

Thank you for your answer. Sadly I see nothing in the redirection plugin logs in terms of redirects of the boatmate.co.uk url/main page. I have however disabled the plugin for now (still visible in admin interface but sholud not take effect anymore). nothing to my eye in htaccess file. I will re-test the issues tomorrow.
However I can't go and deactivate plugins and remove the theme and whatnot as it's a production site. I could create a staging but that comes with other issues and won't reflect what we're dealing with no I suppose.

further investigations have revealed:
- the redirect-issue is related to the non-www url (hidden link) that gets redirect by wordpress, not by the server (x-redirect-header) to hidden link). that's why hidden link does lead to english, but without www it doesn't. The redirection-plugin is disabled and has no effet, caching is disabled, htaccess was cleaned for testing purposes; no server-side caching involved as per hoster. I do not know how WPML is supposed to handle non-www redirects if in WPML settings the URL is entered with www. If changing the URL in WPML from www to non-www the issue switches and non-www urls are handle correctly as expected (=other language) but www-url is redirected to the main-language-url. Maybe you can shed some light on how WPML handles non-www requests when www-url is set in WPML settings for a language; then I can investigate further and edit htaccess if neccessary to mask the issue if no other plugin is messing with the redirects.

- no access to preview draft issue: will set up staging asap and report back for further testing. Have you had any success in clearing the admin access issue you uncovered?

We will be trying out the htaccess workarounds to mitigate the non-www issue.
This should however not affect the main issue of this topic: the review permission error. Right?

we implemented a htcaccess fix that for now resolves the domain-issue, although the problem seems definitely to be part of WP or WPML.
The original problem hasn't been tested again; I have to wait for the editor to be back and start a new translation process so I can check if the permission issue is resolved. I will then report back asap.