CSS Variables: Infinite recursion

Problem/Motivation

On a clean install, I am not able to change colours. When clicking on CSS Variables, I get an infinite recursion on the top message listed below:

#47281 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/Extension/SandboxExtension.php(124): Twig\Extension\SandboxExtension->ensureToStringAllowed()
#47282 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/Extension/SandboxExtension.php(124): Twig\Extension\SandboxExtension->ensureToStringAllowed()
#47283 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/Extension/SandboxExtension.php(124): Twig\Extension\SandboxExtension->ensureToStringAllowed()
#47284 /home/myuser/domains/mydomain/public_html/web/sites/default/files/public/php/twig/672f5fc011298_system-config-form.html.t_tMaJjqEAuBh6RFGSFRprb07Ok/h1Yu-p9k0jM01tJ8aZZf683JDHUa5e_QLvahxKLG1eI.php(44): Twig\Extension\SandboxExtension->ensureToStringAllowed()
#47285 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/Template.php(393): __TwigTemplate_622db1f126e9b7b8b5d73a87ba6c8dee->doDisplay()
#47286 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/Template.php(349): Twig\Template->yield()
#47287 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/Template.php(364): Twig\Template->display()
#47288 /home/myuser/domains/mydomain/public_html/vendor/twig/twig/src/TemplateWrapper.php(35): Twig\Template->render()
#47289 /home/myuser/domains/mydomain/public_html/web/core/themes/engines/twig/twig.engine(33): Twig\TemplateWrapper->render()
#47290 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Theme/ThemeManager.php(348): twig_render_template()
#47291 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Render/Renderer.php(491): Drupal\Core\Theme\ThemeManager->render()
#47292 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Render/Renderer.php(248): Drupal\Core\Render\Renderer->doRender()
#47293 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(238): Drupal\Core\Render\Renderer->render()
#47294 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Render/Renderer.php(638): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}()
#47295 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(231): Drupal\Core\Render\Renderer->executeInRenderContext()
#47296 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(128): Drupal\Core\Render\MainContent\HtmlRenderer->prepare()
#47297 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php(90): Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse()
#47298 [internal function]: Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
#47299 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): call_user_func()
#47300 /home/myuser/domains/mydomain/public_html/vendor/symfony/http-kernel/HttpKernel.php(186): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch()
#47301 /home/myuser/domains/mydomain/public_html/vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#47302 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/Session.php(53): Symfony\Component\HttpKernel\HttpKernel->handle()
#47303 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#47304 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/ContentLength.php(28): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#47305 /home/myuser/domains/mydomain/public_html/web/core/modules/big_pipe/src/StackMiddleware/ContentLength.php(32): Drupal\Core\StackMiddleware\ContentLength->handle()
#47306 /home/myuser/domains/mydomain/public_html/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\big_pipe\StackMiddleware\ContentLength->handle()
#47307 /home/myuser/domains/mydomain/public_html/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass()
#47308 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle()
#47309 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#47310 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/AjaxPageState.php(36): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#47311 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(51): Drupal\Core\StackMiddleware\AjaxPageState->handle()
#47312 /home/myuser/domains/mydomain/public_html/web/core/lib/Drupal/Core/DrupalKernel.php(741): Drupal\Core\StackMiddleware\StackedHttpKernel->handle()
#47313 /home/myuser/domains/mydomain/public_html/web/index.php(19): Drupal\Core\DrupalKernel->handle()
#47314 {main}

Steps to reproduce

Install D10
Install Olivero
Enable basic modules
Go to admin/appearance/css-variables/ui_suite_olivero