Gettting error message related to missing masonry theme

I am getting an error message on the Dashboard page with details as follows. .

User warning: The following theme is missing from the file system: masonry in drupal_get_filename() (line 276 of core/includes/bootstrap.inc).
drupal_get_filename('theme', 'masonry') (Line: 293)
drupal_get_path('theme', 'masonry') (Line: 394)
Drupal\Core\Asset\LibraryDiscoveryParser->drupalGetPath('theme', 'masonry') (Line: 85)
Drupal\Core\Asset\LibraryDiscoveryParser->buildByExtension('masonry') (Line: 87)
Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions('masonry') (Line: 66)
Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss('masonry') (Line: 149)
Drupal\Core\Cache\CacheCollector->get('masonry') (Line: 44)
Drupal\Core\Asset\LibraryDiscovery->getLibrariesByExtension('masonry') (Line: 58)
Drupal\Core\Asset\LibraryDiscovery->getLibraryByName('masonry', 'masonry.layout') (Line: 54)
Drupal\Core\Asset\LibraryDependencyResolver->doGetDependencies(Array) (Line: 31)
Drupal\Core\Asset\LibraryDependencyResolver->getLibrariesWithDependencies(Array) (Line: 104)
Drupal\Core\Asset\AssetResolver->getLibrariesToLoad(Object) (Line: 116)
Drupal\Core\Asset\AssetResolver->getCssAssets(Object, ) (Line: 291)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAssetLibraries(Object, Array) (Line: 161)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object) (Line: 94)
Drupal\big_pipe\Render\BigPipeResponseAttachmentsProcessor->processAttachments(Object) (Line: 45)
Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object, 'kernel.response', Object)
call_user_func(Array, Object, 'kernel.response', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.response', Object) (Line: 191)
Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object, Object, 1) (Line: 173)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 669)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)