TypeError: Cannot read property 'length' of undefined
    at Constructor.renderFilterBlock (eval at <anonymous> (/var/www/bookyourstudy/prod/resources/js/reactServer.js:39:5), <anonymous>:1:620132)
    at Constructor.renderFiltersBlock (eval at <anonymous> (/var/www/bookyourstudy/prod/resources/js/reactServer.js:39:5), <anonymous>:1:621021)
    at Constructor.render (eval at <anonymous> (/var/www/bookyourstudy/prod/resources/js/reactServer.js:39:5), <anonymous>:1:628369)
    at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (/var/www/bookyourstudy/prod/node_modules/react/lib/ReactCompositeComponent.js:587:34)
    at ReactCompositeComponentWrapper._renderValidatedComponent (/var/www/bookyourstudy/prod/node_modules/react/lib/ReactCompositeComponent.js:607:32)
    at ReactCompositeComponentWrapper.wrapper [as _renderValidatedComponent] (/var/www/bookyourstudy/prod/node_modules/react/lib/ReactPerf.js:66:21)
    at ReactCompositeComponentWrapper.mountComponent (/var/www/bookyourstudy/prod/node_modules/react/lib/ReactCompositeComponent.js:220:30)
    at ReactCompositeComponentWrapper.wrapper [as mountComponent] (/var/www/bookyourstudy/prod/node_modules/react/lib/ReactPerf.js:66:21)
    at /var/www/bookyourstudy/prod/node_modules/react/lib/ReactServerRendering.js:42:38
    at ReactServerRenderingTransaction.perform (/var/www/bookyourstudy/prod/node_modules/react/lib/Transaction.js:136:20)