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Fatal error: Uncaught exception InvalidArgumentException with message flexibleSections is not set or not a callable thrown in system/modules/core/library/Contao/Template.php on line 149
#0 templates/fe_flexible_sections_35.html5(32): Contao\Template->__call('flexibleSection...', Array)
#1 templates/fe_flexible_sections_35.html5(32): Contao\FrontendTemplate->flexibleSections('top')
#2 templates/fe_flexible_sections.html5(10): include('/var/customers/...')
#3 system/modules/core/library/Contao/BaseTemplate.php(88): include('/var/customers/...')
#4 system/modules/core/library/Contao/Template.php(277): Contao\BaseTemplate->parse()
#5 system/modules/core/classes/FrontendTemplate.php(46): Contao\Template->parse()
#6 system/modules/core/classes/FrontendTemplate.php(81): Contao\FrontendTemplate->parse()
#7 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#8 system/modules/core/controllers/FrontendIndex.php(267): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#9 index.php(20): Contao\FrontendIndex->run()
#10 {main}