An unhandled error occured

Security exception - value of $_GET['SMDownloadsFile'] = 'Caméras IP_Manuel_Utilisateur_V5.3.0.pdf' is in conflict with value restriction 'Filename'

Stack trace
#0 /home/articom/public_html/base/SMEnvironment.class.php(99): SMEnvironment::getValidatedValue('$_GET', Array, 'SMDownloadsFile', 'Filename', Array)
#1 /home/articom/public_html/extensions/SMDownloads/Main.class.php(14): SMEnvironment::GetQueryValue('SMDownloadsFile', 'Filename')
#2 /home/articom/public_html/base/SMController.class.php(362): SMDownloads->Init()
#3 /home/articom/public_html/base/SMController.class.php(118): SMController->autoExecuteExtensions('Init')
#4 /home/articom/public_html/index.php(22): SMController->Execute()
#5 {main}