The region part of entity view config isn't set for old installs

Confirming the patch in #3 applies cleanly and removes the error stated in the OP.

Thanks.

Actually, I am getting a different line for the same error after upgrading to 8.5.3:

Notice: Undefined index: name in Drupal\field_ui\Element\FieldUiTable::reduceOrder() (line 228 of core/modules/field_ui/src/Element/FieldUiTable.php).
Drupal\field_ui\Element\FieldUiTable::reduceOrder(NULL, Array)

It looks like my changes were clobbered by two updates at once, disregard. The patch still works

Yep, the code looks clean and looks like it does what it's supposed to, so moving to RTBC.

Same here, patch #3 applies cleanly and removes the errors. Thanks

Thank you very much. Confirming RTBC! Is there a plan for a new release?

Luckily this patch is easily applicable to the current 3-beta release.

Works like a charm. Thx.

Confirming that patch at #3 works for me with 8.x-3.0-beta1 on Drupal core 8.6.2. Thanks jhedstrom!

Even after applying #3 patch I meet the initial errors.
Only after the #16 patch they gone and field groups starts to display.

@kala4ek It would be worth opening a new issue as this one has been closed as fixed.

Though the fix is still not released yet. @kala4ek did you try the dev version and after applying the database updates does the problem still persist?

did you try the dev version and after applying the database updates does the problem still persist?

Yep.

I think we can skip it now, cause with clean install there would not be such a problem,
also, seems #3 helps for other people.
I guess, in my case, it's something project-specific.

The patches did not work for me on 8.6.x. The only way I could get this to work was with a clean install of the latest dev release. Think we can get a beta2 release sometime? It has been over a year. Thanks!

EDIT: This is still not fully working for me. Even though both tabs are rendering properly the second tab is still showing as disabled.

EDIT 2: If I export config, manually switch the region, and reimport it finally works.

Thanks for this! Also, if you're having the problem, don't forget the database updates. Without that you will still get the error.

I am with if-jds: nothing is working for me. I am going to attempt a forced replacement of the module files, but I cannot uninstall/reinstall because the site is live and I cannot get time from mgmt to re-do all field groups... The thing works fine on manage form display, but not on manage display, if that means anything. :(

Hey justkristin: did you try the thing where you manually switch the region in your config yml files? If it works locally you can probably roll to your live site. It's not the most ideal solution, but you could maybe let mgmt know it's worth the 30min-1hr you would spend on it (if it improves the client experience). Good luck!

Updated to latest dev of Field Group and still getting this:
Notice: Undefined index: name in Drupal\field_ui\Element\FieldUiTable::reduceOrder() (line 228 of /var/www/vhosts/example.com/httpdocs/core/modules/field_ui/src/Element/FieldUiTable.php) #0

If I then move the field groups out of the disabled region and not add any fields to them but simply save them they then stay in the main config region. At this point I can then move them into place and save and they stay where I left them (usually but not always).

This is still an issue in rc1 version. The module is currently unusable in its current state and reverting back to 1.0 is not advised due to it no longer being supported. Is there a fix for this?

Looks like this broke tests on paragraphs: https://www.drupal.org/project/paragraphs/issues/2907094

I just had a hard time getting rid of these errors.

The following worked for me:

- use 3.x-dev
- add both patches to composer.json:

"drupal/field_group": {
        "Update missing region settings": "https://www.drupal.org/files/issues/2018-04-30/2968184-03.patch",
        "The region part of entity view config isn't set for old installs": "https://www.drupal.org/files/issues/2018-11-29/2968184-16.patch"
      }

- make sure field_group update number is below 8301:
drush ev "drupal_set_installed_schema_version('field_group', 8300)"
- remove composer.lock & run composer install
- run drush updb -y
- run drush cex -y

After this, the notices should be gone & the exported form config should contain the missing regions.

I did what is suggested by @mhmhartman #28 and my "Detail" field groups are still desactivated after migration.
At the same time I have no troubles having field_group 8.x-1.0 with drupal core 8.7.9.
I could also contribute, but I have no hint !

I followed the steps outlined by mhmhartman in #28, except for applying patch 3 since I'm running 8.x-3.0 and patch 3 was committed before that release.

No change. Still get the same errors on existing field groups in the Form Display.

If I delete them and create new ones, though, it seems to work - no error message. But when I try to enable the field_group (i.e. drag a Tab to nest under a Tabs group), the error comes back and the tab remains disabled.

I could only get this to work by exporting the config for the entity form display, editing manually, and then importing the edits

#28 worked for me for D8.8 and v3.0.0

After updating to D8.9 and v3.1.0, the patches are no longer needed and everything works great!