InvalidComponentException when workspaces ui is installed

Problem/Motivation

with the latest state of 11.x, a fresh site install with the standard profile (did a drush sql:drop right before), uninstalled the toolbar module and installed the navigation module plus a few more core modules(content moderation, responsive images, media), as soon as i am installing workspaces and workspaces ui i get the following new error:

The website encountered an unexpected error. Try again later.

Drupal\Core\Render\Component\Exception\InvalidComponentException: [navigation:toolbar-button/icon] NULL value found, but an object is required. in Drupal\Core\Theme\Component\ComponentValidator->validateProps() (line 232 of core/lib/Drupal/Core/Theme/Component/ComponentValidator.php).
Drupal\Core\Template\ComponentsTwigExtension->doValidateProps() (Line: 106)
Drupal\Core\Template\ComponentsTwigExtension->validateProps() (Line: 47)
__TwigTemplate_0fe65a4c3914659ea1cbf43cfba3b541->doDisplay() (Line: 388)
Twig\Template->yield() (Line: 151)
__TwigTemplate_820f6accfc70093bd7b1bb2211317ab1->{closure}() (Line: 2079)
Twig\Extension\CoreExtension::captureOutput() (Line: 77)
__TwigTemplate_820f6accfc70093bd7b1bb2211317ab1->macro_menu_items() (Line: 54)
__TwigTemplate_820f6accfc70093bd7b1bb2211317ab1->doDisplay() (Line: 388)
Twig\Template->yield() (Line: 344)
Twig\Template->display() (Line: 359)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 34)
twig_render_template() (Line: 380)
Drupal\Core\Theme\ThemeManager->render() (Line: 493)
Drupal\Core\Render\Renderer->doRender() (Line: 245)
Drupal\Core\Render\Renderer->doRenderRoot() (Line: 141)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 623)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 140)
Drupal\Core\Render\Renderer->renderInIsolation() (Line: 167)
Drupal\Core\Render\Renderer->doRenderPlaceholder() (Line: 725)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}()
Fiber->start() (Line: 733)
Drupal\Core\Render\Renderer->replacePlaceholders() (Line: 256)
Drupal\Core\Render\Renderer->doRenderRoot() (Line: 141)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 623)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 140)
Drupal\Core\Render\Renderer->renderInIsolation() (Line: 167)
Drupal\Core\Render\Renderer->doRenderPlaceholder() (Line: 725)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}()
Fiber->start() (Line: 733)
Drupal\Core\Render\Renderer->replacePlaceholders() (Line: 256)
Drupal\Core\Render\Renderer->doRenderRoot() (Line: 141)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 623)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 140)
Drupal\Core\Render\Renderer->renderInIsolation() (Line: 111)
Drupal\Core\Render\Renderer->renderRoot() (Line: 253)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderPlaceholders() (Line: 74)
Drupal\big_pipe\Render\BigPipeResponseAttachmentsProcessor->processAttachments() (Line: 45)
Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond() (Line: 246)
Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}() (Line: 206)
Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (Line: 56)
Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (Line: 216)
Symfony\Component\HttpKernel\HttpKernel->filterResponse() (Line: 204)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 116)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 90)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 715)
Drupal\Core\DrupalKernel->handle() (Line: 19)

the error is gone on ddev drush pmu navigation && ddev drush en toolbar and returns on ddev drush pmu toolbar && ddev drush en navigation. also searched the issue queue but havent found any matches yet.

(on ddev with php 8.3)

Steps to reproduce

• install the latest version of 11.x
• install the navigation module
• install workspaces ui module

Enabling just Navigation + Workspaces modules (without Workspaces UI module) does not seems to throw an error.

Proposed resolution

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet