Exception - colors aco-licensed

gistfile1.txt

[ Oct 22 2015 13:08:15 ] [87.238.34.135] Error in getContrastingColor:
exception 'InvalidArgumentException' with message 'Invalid color value' in /www/deploy/extensions/aco_licensed_products/classes/Color.php:12
Stack trace:
#0 /www/deploy/extensions/aco_licensed_products/classes/AcoOperators.php(130): Color::fromHex('')
#1 /www/aschehoug/ez54/ezpublish_legacy/lib/eztemplate/classes/eztemplate.php(1349): AcoOperators->modify(Object(eZTemplate), 'getContrastingC...', Array, '', '', '', Array, false)
#2 /www/aschehoug/ez54/ezpublish_legacy/var/ezflow_site/cache/template/compiled/vgs_page_header-ec37ed0a56543d5b399fa52526f477d9.php(2188): eZTemplate->processOperator('getContrastingC
...', Array, '', '', Array, false, false)
#3 /www/aschehoug/ez54/ezpublish_legacy/var/ezflow_site/cache/template/compiled/gripteksten_vg2_l3-9cecb54b6d3047149abbbb328d7d162d.php(174): include('/www/aschehoug/...')
#4 /www/aschehoug/ez54/ezpublish_legacy/lib/eztemplate/classes/eztemplatecompiler.php(448): include('/www/aschehoug/...')
#5 /www/aschehoug/ez54/ezpublish_legacy/lib/eztemplate/classes/eztemplatecompiler.php(404): eZTemplateCompiler::executeCompilationHelper('var/ezflow_site...', '\n\n\n<div class="...', 
Object(eZTemplate), '39a0ce230abf2c8...', Array, '', '')
#6 /www/aschehoug/ez54/ezpublish_legacy/lib/eztemplate/classes/eztemplatefileresource.php(114): eZTemplateCompiler::executeCompilation(Object(eZTemplate), Array, '39a0ce230abf2c8...', 
Array, '', '')
#7 /www/aschehoug/ez54/ezpublish_legacy/lib/eztemplate/classes/eztemplate.php(987): eZTemplateFileResource->executeCompiledTemplate(Object(eZTemplate), Array, 'file:extension/...', 'de
sign:node/vie...', Array, 'node/view/full....', Array, 1402390046, '', '')
#8 /www/aschehoug/ez54/ezpublish_legacy/lib/eztemplate/classes/eztemplate.php(529): eZTemplate->executeCompiledTemplate(Array, Array, '', '', Array)
#9 /www/aschehoug/ez54/ezpublish_legacy/kernel/classes/eznodeviewfunctions.php(193): eZTemplate->fetch('design:node/vie...')
#10 /www/aschehoug/ez54/ezpublish_legacy/kernel/classes/eznodeviewfunctions.php(601): eZNodeviewfunctions::generateNodeViewData(Object(eZTemplate), Object(eZContentObjectTreeNode), Obj
ect(eZContentObject), false, 'full', false, Array, false, Array)
#11 [internal function]: eZNodeviewfunctions::contentViewGenerate('var/ezflow_site...', Array)
#12 /www/aschehoug/ez54/ezpublish_legacy/kernel/private/classes/clusterfilehandlers/ezdfsfilehandler.php(692): call_user_func_array(Array, Array)
#13 /www/aschehoug/ez54/ezpublish_legacy/kernel/content/view.php(189): eZDFSFileHandler->processCache(Array, Array, NULL, NULL, Array)
#14 /www/aschehoug/ez54/ezpublish_legacy/lib/ezutils/classes/ezprocess.php(46): include('/www/aschehoug/...')
#15 /www/aschehoug/ez54/ezpublish_legacy/lib/ezutils/classes/ezprocess.php(21): eZProcess->runFile(Array, 'kernel/content/...', true)
#16 /www/aschehoug/ez54/ezpublish_legacy/lib/ezutils/classes/ezmodule.php(1794): eZProcess::run('kernel/content/...', Array, true)
#17 /www/aschehoug/ez54/ezpublish_legacy/kernel/private/classes/ezpkernelweb.php(801): eZModule->run('view', Array, false, Array)
#18 /www/aschehoug/ez54/ezpublish_legacy/kernel/private/classes/ezpkernelweb.php(330): ezpKernelWeb->dispatchLoop()
#19 /www/aschehoug/ez54/ezpublish_legacy/kernel/private/classes/ezpkernel.php(53): ezpKernelWeb->run()
#20 /www/aschehoug/ez54/ezpublish_legacy/index.php(23): ezpKernel->run()
#21 {main}