Administration->Database Usage->Reports throws error "The unserialization has failed!"

System Summary
804 users
240 segments
70 goals
7 tracking failures
829 websites
52 activated plugins
3 containers (in tag manager)
Matomo version: 3.14.1
MySQL version: 5.7.22-log
PHP version: 7.3.17

  1. We are migrating from an AWS Windows server/environment to an AWS Linux server/environment.

  2. The Matomo, MySQL, and PHP versions are the same for both source/target environments.

  3. We copied/restored the source database to the target database, and all users, segments, goals, tracking failures, websites, plugins, and container counts match.

  4. While simply doing a source/target side-by-side webapp screen comparison, in/on the Administration->Diagnostic->Database Usage page, in the Reports section, we see this error: “The unserialization has failed!”

  5. The following related error is in the php/log file:

WARNING DBStats[2021-05-27 16:39:28 UTC] [0a2c9] /data_disk01/matomo/core/Common.php(297): Notice - unserialize(): Error at offset 32763 of 32768 bytes - Matomo 3.14.1 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already) [internal function]: Piwik\ErrorHandler::errorHandler(),#1/core/Common.php(297),#2/core/DataTable.php(1402),#3/core/DataTable.php(1427),#4/core/DataTable.php(1880),#5/plugins/DBStats/MySQLMetadataProvider.php(211),#6/plugins/DBStats/MySQLMetadataProvider.php(170),#7/plugins/DBStats/API.php(203),[internal function]: Piwik\Plugins\DBStats\API->getIndividualReportsSummary(),#9/core/API/Proxy.php(237)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] Failed to get data from API: /data_disk01/matomo/core/DataTable.php(1408): The unserialization has failed!
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] The unserialization has failed!
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #0 /data_disk01/matomo/core/DataTable.php(1427): Piwik\DataTable->unserializeRows(‘a:291:{i:0;a:3:…’)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #1 /data_disk01/matomo/core/DataTable.php(1880): Piwik\DataTable->addRowsFromSerializedArray(‘a:291:{i:0;a:3:…’)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #2 /data_disk01/matomo/plugins/DBStats/MySQLMetadataProvider.php(211): Piwik\DataTable::fromSerializedArray(‘a:291:{i:0;a:3:…’)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #3 /data_disk01/matomo/plugins/DBStats/MySQLMetadataProvider.php(170): Piwik\Plugins\DBStats\MySQLMetadataProvider->getRowCountsByArchiveName(Array, ‘getEstimatedBlo…’, false, Array, Array)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #4 /data_disk01/matomo/plugins/DBStats/API.php(203): Piwik\Plugins\DBStats\MySQLMetadataProvider->getRowCountsAndSizeByBlobName(false)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #5 [internal function]: Piwik\Plugins\DBStats\API->getIndividualReportsSummary(false)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #6 /data_disk01/matomo/core/API/Proxy.php(237): call_user_func_array(Array, Array)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #7 /data_disk01/matomo/core/Context.php(28): Piwik\API\Proxy->Piwik\API{closure}()
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #8 /data_disk01/matomo/core/API/Proxy.php(328): Piwik\Context::executeWithQueryParameters(Array, Object(Closure))
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #9 /data_disk01/matomo/core/Plugin/Visualization.php(343): Piwik\API\Proxy->call(’\Piwik\Plugins\…’, ‘getIndividualRe…’, Array)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #10 /data_disk01/matomo/core/Plugin/Visualization.php(187): Piwik\Plugin\Visualization->loadDataTableFromAPI()
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #11 /data_disk01/matomo/core/Plugin/Report.php(320): Piwik\Plugin\Visualization->render()
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #12 /data_disk01/matomo/plugins/CoreHome/Controller.php(58): Piwik\Plugin\Report->render()
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #13 [internal function]: Piwik\Plugins\CoreHome\Controller->renderReportWidget(Object(Piwik\Plugins\DBStats\Reports\GetIndividualReportsSummary))
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #14 /data_disk01/matomo/core/FrontController.php(590): call_user_func_array(Array, Array)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #15 /data_disk01/matomo/core/FrontController.php(165): Piwik\FrontController->doDispatch(‘DBStats’, ‘getIndividualRe…’, Array)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #16 /data_disk01/matomo/core/dispatch.php(34): Piwik\FrontController->dispatch()
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #17 /data_disk01/matomo/index.php(27): require_once(’/data_disk01/ma…’)
ERROR CoreHome[2021-05-27 16:39:28 UTC] [0a2c9] #18 {main}

Why?