Search module is not working properly

I am using bootstrap barrio theme

full backtrace for the error

TypeError: strip_tags(): Argument #1 ($string) must be of type string, array given in strip_tags() (line 1120 of /code/vendor/twig/twig/src/Extension/CoreExtension.php)
#0 /code/vendor/twig/twig/src/Extension/CoreExtension.php(1120): strip_tags(Array, NULL)
#1 /tmp/rolling/live_13/twig/63d484a15a0d2_paragraph--section_six_ca_MsCeIVUMbWuwlCFVlmGB8oVEl/S-FIJS_7Jg3rOC5Tbnbp-uxqAp--unDy8P7d1QQng4U.php(111): twig_striptags(Array)
#2 /code/vendor/twig/twig/src/Template.php(405): __TwigTemplate_d0fc208014a2658a4fa7261afad5c1554728b41a1b6ca7ca4e939db924a8feb2->doDisplay(Array, Array)
#3 /code/vendor/twig/twig/src/Template.php(378): Twig\Template->displayWithErrorHandling(Array, Array)
#4 /code/vendor/twig/twig/src/Template.php(390): Twig\Template->display(Array)
#5 /code/web/core/themes/engines/twig/twig.engine(55): Twig\Template->render(Array)
#6 /code/web/core/lib/Drupal/Core/Theme/ThemeManager.php(384): twig_render_template('themes/childtheme...', Array)
#7 /code/web/core/lib/Drupal/Core/Render/Renderer.php(433): Drupal\Core\Theme\ThemeManager->render('paragraph', Array)
#8 /code/web/core/lib/Drupal/Core/Render/Renderer.php(204): Drupal\Core\Render\Renderer->doRender(Array, false)
#9 /code/web/core/lib/Drupal/Core/Template/TwigExtension.php(479): Drupal\Core\Render\Renderer->render(Array)
#10 /tmp/rolling/live_13/twig/63d484a15a0d2_field.html.twig_0g0RGvrIcOEL0terb1vEN_PRN/REVYgcI37uj7KSrTlzMlMmitWcFLTinySvoC2COpuv0.php(67): Drupal\Core\Template\TwigExtension->escapeFilter(Object(Drupal\Core\Template\TwigEnvironment), Array, 'html', NULL, true)
#11 /code/vendor/twig/twig/src/Template.php(405): __TwigTemplate_7fe1dbd914b036222150699fc1bc438b95bebc68a9386d62078211339b4472fc->doDisplay(Array, Array)
#12 /code/vendor/twig/twig/src/Template.php(378): Twig\Template->displayWithErrorHandling(Array, Array)
#13 /code/vendor/twig/twig/src/Template.php(390): Twig\Template->display(Array)
#14 /code/web/core/themes/engines/twig/twig.engine(55): Twig\Template->render(Array)
#15 /code/web/core/lib/Drupal/Core/Theme/ThemeManager.php(384): twig_render_template('themes/contrib/...', Array)
#16 /code/web/core/lib/Drupal/Core/Render/Renderer.php(433): Drupal\Core\Theme\ThemeManager->render('field', Array)
#17 /code/web/core/lib/Drupal/Core/Render/Renderer.php(446): Drupal\Core\Render\Renderer->doRender(Array)
#18 /code/web/core/lib/Drupal/Core/Render/Renderer.php(204): Drupal\Core\Render\Renderer->doRender(Array, true)
#19 /code/web/core/lib/Drupal/Core/Render/Renderer.php(160): Drupal\Core\Render\Renderer->render(Array, true)
#20 /code/web/core/lib/Drupal/Core/Render/Renderer.php(580): Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}()
#21 /code/web/core/lib/Drupal/Core/Render/Renderer.php(161): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#22 /code/web/core/modules/node/src/Plugin/Search/NodeSearch.php(371): Drupal\Core\Render\Renderer->renderPlain(Array)
#23 /code/web/core/modules/node/src/Plugin/Search/NodeSearch.php(242): Drupal\node\Plugin\Search\NodeSearch->prepareResults(Object(Drupal\Core\Database\StatementWrapper))
#24 /code/web/core/modules/search/src/Plugin/SearchPluginBase.php(98): Drupal\node\Plugin\Search\NodeSearch->execute()
#25 /code/web/core/modules/search/src/Controller/SearchController.php(102): Drupal\search\Plugin\SearchPluginBase->buildResults()
#26 [internal function]: Drupal\search\Controller\SearchController->view(Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\search\Entity\SearchPage))
#27 /code/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array)
#28 /code/web/core/lib/Drupal/Core/Render/Renderer.php(580): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#29 /code/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#30 /code/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array)
#31 /code/vendor/symfony/http-kernel/HttpKernel.php(169): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#32 /code/vendor/symfony/http-kernel/HttpKernel.php(81): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#33 /code/web/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#34 /code/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#35 /code/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(191): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#36 /code/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(128): Drupal\page_cache\StackMiddleware\PageCache->fetch(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#37 /code/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(82): Drupal\page_cache\StackMiddleware\PageCache->lookup(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#38 /code/web/core/modules/ban/src/BanMiddleware.php(50): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#39 /code/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\ban\BanMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#40 /code/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#41 /code/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#42 /code/web/core/lib/Drupal/Core/DrupalKernel.php(713): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#43 /code/web/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#44 {main}

Yes @clifen this is a custom for privacy matter I user child theme and replica of Bootstrap barrio theme

Search is not working properly few keyword getting searched but few gives error

Theme is the custom theme

name: themename
type: theme
description: 'Basic structure for a theme.'
core: 8.x
core_version_requirement: ^8 || ^9
base theme: bootstrap_barrio

I am ready to Quicky answer you queries.

The theme file being rendered is something like themes/childtheme…. Is that a custom theme?

Ans. Yes this is a custom theme

Is this replicable with Olivero theme?
Ans. No

What change precipitated this issue?
Ans. After migrate Drupal 8 to Drupal 9

Below is the code in the file

{%
set classes = [
'paragraph',
'paragraph--type--' ~ paragraph.bundle|clean_class,
view_mode ? 'paragraph--view-mode--' ~ view_mode|clean_class,
]
%}

<div class="view-header">
    <div class="headings fadeInUp wow">
        <h2> {{ content.field_title}}</h2>
        {% if content.field_description.0 is not empty %}
        <p>{{ content.field_description }}</p>
        {% endif %}
    </div>
</div>

<div class="row">
    <div class="col-md-6 fadeInUp wow">
        <div class="parter-desc-block">
            <h3>{{ content.field_left_title }}</h3>
           
            <div class="parter-img-new">			
				<img src="{{ file_url(paragraph.field_left_side_image_in_place_o.entity.uri.value) }}"/>
            </div>
            
        </div>
    </div>
    <div class="col-md-6 fadeInUp wow">
        <div class="parter-desc-block">
            <h3>{{ content.field_right_title }}</h3>
            <div class="owl-slider">
                <div id="partner-slider" class="owl-carousel partner-slider">
                    {% if paragraph.field_carousel|length > 0 %}
                        {% for object in paragraph.field_carousel %}
                        <div class="item">
                            <div class="partner-slide-content">
                                <p> {{ object.entity.field_description.value|striptags }}</p>
                                <img src="{{ file_url(object.entity.field_about_image.entity.uri.value) }}" alt="{{ object.entity.field_about_image.alt }}" class="img-fluid">
                                <h6>{{ object.entity.field_partner_name.value }}</h6>
                            </div>
                        </div>
                        {% endfor %}
                    {% endif %}                   
                </div>
            </div>
        </div>
    </div>
</div>

I am using same theme in Drupal 8 and It is working fine. I am sure this is a core issue

No PHP <8

I see when I disabled search module and enable it worked fine

If this is php issue it should not worked after uninstall and enabled

What is the role of template (twig file where it consider error) in the search that I break the search?