Class Okay\Modules\Sago\ExtensionCallbacks\Extenders\FrontExtender::postCallback not callable
#0 /home/ks/web/kancelyaria.com.ua/public_html/Okay/Core/Modules/Extender/ExtenderFacade.php(31): Okay\Core\Modules\Extender\AbstractExtender->newExtension('Okay\\Requests\\C...', 'postCallback', 'Okay\\Modules\\Sa...', 'postCallback')
#1 /home/ks/web/kancelyaria.com.ua/public_html/Okay/Core/Modules/AbstractInit.php(240): Okay\Core\Modules\Extender\ExtenderFacade->newChainExtension(Array, Array)
#2 /home/ks/web/kancelyaria.com.ua/public_html/Okay/Modules/Sago/ExtensionCallbacks/Init/Init.php(40): Okay\Core\Modules\AbstractInit->registerChainExtension(Array, Array)
#3 /home/ks/web/kancelyaria.com.ua/public_html/vendor/okaycms/license/src/OkayLicense/License.php(2): Okay\Modules\Sago\ExtensionCallbacks\Init\Init->init()
#4 /home/ks/web/kancelyaria.com.ua/public_html/Okay/Core/Modules/Modules.php(162): OkayLicense\License->startModule('78', 'Sago', 'ExtensionCallba...')
#5 /home/ks/web/kancelyaria.com.ua/public_html/Okay/Core/Modules/Modules.php(99): Okay\Core\Modules\Modules->startModules(true)
#6 /home/ks/web/kancelyaria.com.ua/public_html/index.php(56): Okay\Core\Modules\Modules->startEnabledModules()
#7 {main}