Hi Nigel,
sorry to ask (feels stupid) but after adding the code to wp-config.php and running the database-migrations again, I don't see any log-files in wp-content.
No problem, that just means that no errors were written to the log, and there won't be such a file until such time as an errors or warnings are generated.
As this seems to be specific to your server, can we get credentials to access the site? I may want to temporarily add one or two plugins to help with debugging if that's okay.
If this same problem occurs on your staging site, let's use that rather than the live site.
Let me mark your next reply as private so that I can get log-in credentials from you—you may want to create a temporary admin user for me to use that you can later delete. And be sure to have a current backup of your site.
I've done some preliminary checks and have shared details with the lead Types developer, who will look at this next week. Please keep the staging site available until I get back to you with an update, if that's okay.
I updated the staging website to latest version of WP and all plugins. Still no change in this issue.
> The upgrade process is starting...
> Precondition "correct database layer mode"... OK
> Precondition "toolset_associations table exists"... ERR
I spoke to the Types developer this morning and they said they were working on it today (there is your site plus one other where the migration will not complete with the same error message, though the specifics are different). They have been working on related issues until now that were more urgent (your site will continue to work normally without completing the migration).
There will be a few absences over Christmas, but hopefully we'll have something for you soon, and if not before Christmas, have a good one.
Just to keep you up-to-date, the Types developer has identified the problem in your case (it relates to the specifics of how the database reports the tablenames in the context of the particular prefix you are using), and it will be trivial to fix.
I'm not sure when the fix will become available right now, but we have got to the bottom of the problem.
The Types update is now available from your account downloads page. If you don't see it in the WordPress admin, click the Check for Updates button on the Toolset installer page.