Column classes are not inserted to Twig template, only the word "Array."

I am seeing the same issue. Any idea on what we can do to get this rectified?

Warning: Array to string conversion in Drupal\Core\Template\AttributeArray->__toString() (line 77 of core/lib/Drupal/Core/Template/AttributeArray.php).

Drupal\Core\Template\AttributeArray->__toString() (Line: 53)
Drupal\Core\Template\AttributeValueBase->render() (Line: 324)
Drupal\Core\Template\Attribute->__toString() (Line: 67)
__TwigTemplate_1ba1f19c738d22c3be2d0f534d017b73->doDisplay(Array, Array) (Line: 405)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 378)
Twig\Template->display(Array) (Line: 390)
Twig\Template->render(Array) (Line: 55)
twig_render_template('modules/contrib/bootstrap_layout_builder/templates/blb-section.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('blb_section', Array) (Line: 433)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 241)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 580)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 242)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 132)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 164)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 81)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 707)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

I have tracked down the offending line of twig code, in the blb-section.html.twig file the line:

I was using dev and not release. I do not see the issue on the release version.

Not wanting to beat a dead horse, however I have found no reference anywhere that shows that in the dev version that the following line will work:

Can anyone buy me a clue on this one? I am using 3.0 dev version, and the offending line is

Can confirm I'm seeing this issue now too just randomly .

I am also seeing this after upgrading to 2.1.0 from 2.0.1.

Howdy,

Been successfully using this great module in combination with a Bootstrap 3 sub-theme.

Today, I updated the module from 2.0.1 to 2.1.0, and I started seeing the same problem described here.

I have not been able to find a solution so far, so I had to downgrade to 2.0.1 for now.

As a temporary solution, I configured the column classes for each section from the UI as shown in the attached screenshot. For example, I had a section with three columns each one having the class 'col-lg-4 col-md-4 col-12'. Adding the class 'col-lg-4 col-md-4 col-12' from the UI results in:

<div class="Array col-lg-4 col-md-4 col-12"></div>
<div class="Array col-lg-4 col-md-4 col-12"></div>
<div class="Array col-lg-4 col-md-4 col-12"></div>

which renders the section correctly.

@plessas

Thank you for the temporary solution. It can confirm that it does the trick.

Confirm the same problem. After update all page layouts are broken, and in stead of the usual bootstrap code I see this 'Array' code.

Consider #10 as a temporary solution for a small set of pages.

I am not a coder so I am stuck for now... hope there will be a solution soon. I can test if applicable.

So I was searching for a solution, bud can't find...

I update the website with "composer update".
The line for updating this module was: ""require": {
"drupal/bootstrap_layout_builder": "^2.0","

Then the module update to 2.1.0 and this problem is occuring. Then I set "drupal/bootstrap_layout_builder": "2.0"," , so fixed the version to 2.0 and execute composer update. The system is downgrading to 2.0 then I don't have this issue.

After "composer update", all other modules + drupal are up-to-date.
For your info, after the update: Drupal is 9.5.1, the theme is Barrio Bootstrap 5 Theme 5.5.8. PHP 8.1. (and bootstrap_layout_builder is 2.0)

@plessas @jorgemare

Are you still able to edit sections when you add classes to rows? When I add classes to the rows in a section I can no longer edit the section.
There's an Uncaught Drupal.AjaxError error showing in my browser console.

I'm using Drupal 9.5.1. and the default Bootstrap 5 theme.

This patch fixes the problem for version 2.1.0.

Confirmed the patch #15 fixes the issue.

Updating to critical as the module doesn't work currently.

Thank you all, Added to 2.1.1 release.

@marcom2021

The just released version 2.1.1 fixes the problem described here, and the inability to edit sections that you reported (which I did see later in my test environment).

Thank you @mahmoud-zayed for the prompt response!

@jmaerckaert @mahmoud-zayed
Top! Thanks for the super-rapid-response!

I installed the #2.1.1 and can confirm that the problems are solved.

Thanks, GH Lukassen