Deprecated function: Using null as an array offset in LayoutParagraphsLayout::getComponentByUuid()

Problem/Motivation

Deprecated function: Using null as an array offset is deprecated, use an empty string instead in Drupal\\layout_paragraphs\\LayoutParagraphsLayout->getComponentByUuid() (line 322 of /var/www/html/web/modules/contrib/layout_paragraphs/src/LayoutParagraphsLayout.php) [664026eb-73a1-4fb7-8f57-334a943b7638]
#0 /modules/contrib/layout_paragraphs/src/LayoutParagraphsLayout.php(322): Drupal\\error_page\\ErrorPageErrorHandler::handleError()\n#1 /var/www/html/web/modules/custom/joinup_paragraphs/src/EventSubscriber/TilesParagraphRestrictionSubscriber.php(51): Drupal\\layout_paragraphs\\LayoutParagraphsLayout->getComponentByUuid()
#2 /modules/custom/joinup_paragraphs/src/EventSubscriber/TilesParagraphRestrictionSubscriber.php(32): Drupal\\joinup_paragraphs\\EventSubscriber\\TilesParagraphRestrictionSubscriber->isLayout()
#3 /vendor/symfony/event-dispatcher/EventDispatcher.php(246): Drupal\\joinup_paragraphs\\EventSubscriber\\TilesParagraphRestrictionSubscriber->tilesRestriction()
#4 /vendor/symfony/event-dispatcher/EventDispatcher.php(206): Symfony\\Component\\EventDispatcher\\EventDispatcher::@closure:Symfony\\Component\\EventDispatcher\\EventDispatcher::optimizeListeners():241()
#5 /vendor/symfony/event-dispatcher/EventDispatcher.php(56): Symfony\\Component\\EventDispatcher\\EventDispatcher->callListeners()

Steps to reproduce

Add a new paragraph/component at the top level of a Layout Paragraphs field (i.e. with no parent section) via the "Choose component" dialog.