Cannot remember exact steps but was uploading JPEG images and embedding them via {F1234} syntax in a task description and a task comment to test thumbnailing.
Phorge at 67b7181f522673b05435083ce28106bdfa320e18, PHP 8.3.6.
[2024-05-13 14:28:03] ERROR 8192: strlen(): Passing null to parameter #1 ($string) of type string is deprecated at [/var/www/html/phorge/phorge/src/applications/files/document/render/PhabricatorDocumentRenderingEngine.php:211] arcanist(head=master, ref.master=7f28d7266f81), phorge(head=master, ref.master=67b7181f5226), translations(head=wmf/stable, ref.master=09fe573a932a, ref.wmf/stable=e45c643766c8) #0 PhabricatorDocumentRenderingEngine::newRenderResponse(PhabricatorDocumentRef) called at [<phorge>/src/applications/files/controller/PhabricatorFileDocumentController.php:33] #1 PhabricatorFileDocumentController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284] #2 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:203] #3 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phorge>/webroot/index.php:35] [2024-05-13 14:28:03] ERROR 8192: strlen(): Passing null to parameter #1 ($string) of type string is deprecated at [/var/www/html/phorge/phorge/src/applications/files/document/render/PhabricatorDocumentRenderingEngine.php:216] arcanist(head=master, ref.master=7f28d7266f81), phorge(head=master, ref.master=67b7181f5226), translations(head=wmf/stable, ref.master=09fe573a932a, ref.wmf/stable=e45c643766c8) #0 PhabricatorDocumentRenderingEngine::newRenderResponse(PhabricatorDocumentRef) called at [<phorge>/src/applications/files/controller/PhabricatorFileDocumentController.php:33] #1 PhabricatorFileDocumentController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284] #2 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:203] #3 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phorge>/webroot/index.php:35]