Diff Plus - Deprecated function mb_convert_encoding

Problem/Motivation

Deprecated function: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in Caxy\HtmlDiff\Table\TableDiff->createDocumentWithHtml() (line 630 of /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php)

#0 /var/www/web/core/includes/bootstrap.inc(166): _drupal_error_handler_real()
#1 [internal function]: _drupal_error_handler()
#2 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(630): mb_convert_encoding()
#3 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(740): Caxy\HtmlDiff\Table\TableDiff->createDocumentWithHtml()
#4 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(599): Caxy\HtmlDiff\Table\TableDiff->setInnerHtml()
#5 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(819): Caxy\HtmlDiff\Table\TableDiff->diffCells()
#6 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(497): Caxy\HtmlDiff\Table\TableDiff->diffCellsAndIncrementCounters()
#7 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(847): Caxy\HtmlDiff\Table\TableDiff->diffRows()
#8 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(286): Caxy\HtmlDiff\Table\TableDiff->diffAndAppendRows()
#9 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(212): Caxy\HtmlDiff\Table\TableDiff->processEqualOperation()
#10 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(147): Caxy\HtmlDiff\Table\TableDiff->diffTableRowsWithMatches()
#11 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php(106): Caxy\HtmlDiff\Table\TableDiff->diffTableContent()
#12 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/HtmlDiff.php(395): Caxy\HtmlDiff\Table\TableDiff->build()
#13 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/HtmlDiff.php(331): Caxy\HtmlDiff\HtmlDiff->diffTables()
#14 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/HtmlDiff.php(442): Caxy\HtmlDiff\HtmlDiff->diffIsolatedPlaceholder()
#15 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/HtmlDiff.php(247): Caxy\HtmlDiff\HtmlDiff->processEqualOperation()
#16 /var/www/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/HtmlDiff.php(110): Caxy\HtmlDiff\HtmlDiff->performOperation()
#17 /var/www/vendor/mkalkbrenner/php-htmldiff-advanced/src/HtmlDiffAdvanced.php(85): Caxy\HtmlDiff\HtmlDiff->build()
#18 /var/www/web/modules/contrib/diff/src/Plugin/diff/Layout/VisualInlineDiffLayout.php(155): HtmlDiffAdvanced->build()
#19 /var/www/web/modules/contrib/diff/src/Controller/PluginRevisionController.php(146): Drupal\diff\Plugin\diff\Layout\VisualInlineDiffLayout->build()
#20 /var/www/web/modules/contrib/diff/src/Controller/NodeRevisionController.php(55): Drupal\diff\Controller\PluginRevisionController->compareEntityRevisions()
#21 [internal function]: Drupal\diff\Controller\NodeRevisionController->compareNodeRevisions()
#22 /var/www/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array()
#23 /var/www/web/core/lib/Drupal/Core/Render/Renderer.php(638): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#24 /var/www/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(121): Drupal\Core\Render\Renderer->executeInRenderContext()
#25 /var/www/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext()
#26 /var/www/vendor/symfony/http-kernel/HttpKernel.php(181): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#27 /var/www/vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#28 /var/www/web/core/lib/Drupal/Core/StackMiddleware/Session.php(53): Symfony\Component\HttpKernel\HttpKernel->handle()
#29 /var/www/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#30 /var/www/web/core/lib/Drupal/Core/StackMiddleware/ContentLength.php(28): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#31 /var/www/web/core/modules/big_pipe/src/StackMiddleware/ContentLength.php(32): Drupal\Core\StackMiddleware\ContentLength->handle()
#32 /var/www/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\big_pipe\StackMiddleware\ContentLength->handle()
#33 /var/www/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass()
#34 /var/www/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle()
#35 /var/www/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#36 /var/www/web/core/lib/Drupal/Core/StackMiddleware/AjaxPageState.php(36): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#37 /var/www/web/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(51): Drupal\Core\StackMiddleware\AjaxPageState->handle()
#38 /var/www/web/core/lib/Drupal/Core/DrupalKernel.php(741): Drupal\Core\StackMiddleware\StackedHttpKernel->handle()
#39 /var/www/web/index.php(19): Drupal\Core\DrupalKernel->handle()
#40 {main}

Steps to reproduce

( The revisions compare a node which contains a viewfield.
The viewfield contains a view which has an exposed filter form. The error seems to be caused by a term reference field on this exposed filter form.)
It is more simple than that. The error appears on every diff.
php 8.36 on D10.3.6

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes