I have tested this item ? unsuccessfully on bc54f8f

In my test, update a site from Joomla 3.4.8 to 3.7 rc* with your PR no more notices but some old and new error message:
Warning
JInstaller: :Install: SQL File Buffer Read Error.
Files Update: SQL error file DB function reports no errors.
Error loading component: com_fields, Component not found.

and the component menu is almost empty

The "SQL File Buffer Read Error" is either a corrupt SQL update file or a local filesystem permissions issue. Unrelated to this PR.

Actually, none of your warning messages can be caused by this PR. Therefore, if you are no longer getting the Undefined property: stdClass::$client_id error message as noted in the original issue then this PR is successful for the issue it is aiming to address.

I use a custom xml update url to test the PR:
http://alexred.com/joomla/2017/next_minor_list.xml
You can try to find if there is a corrupt SQL update file. I edit the nightly update package like in this PR, rezip, and upload it on my server to test it in the update procedure.
If I use the original nightly update package no SQL File Buffer Read Error"

I have tested this item ✅ successfully on bc54f8f

A bit tricky to test, here is what I did:

• Do an update without adding the patch and let the system run into the problem.
• Replace the file administrator/modules/mod_menu/preset/enabled.php with the patched version
• Reload the page

You will still see warnings but these have a different source.

Continue the update process

I have tested this item ✅ successfully on bc54f8f

Works great. Thanks.

@AlexRed please test it using the way @rdeutz posted above. THis way we are sure there is no Problem with your package ?

RTC after two successful tests.