Getting this in error logs while setting up the system. 

Could not write to Store-FileSystem (furl_configuration)
#0 \system\Data\AbstractData.php(108): IPS\_Log::log('Could not write...', 'datastore')
#1 \system\Data\Store.php(245): IPS\Data\_AbstractData->__set('furl_configurat...', '{"login":{"frie...')
#2 \system\Http\Url\Friendly.php(730): IPS\Data\_Store->__set('furl_configurat...', '{"login":{"frie...')
#3 \system\Http\Url\Friendly.php(676): IPS\Http\Url\_Friendly::buildFurlConfiguation()
#4 \init.php(902) : eval()'d code(19): IPS\Http\Url\_Friendly::furlDefinition(false)
#5  \system\Http\Url\Friendly.php(90): IPS\Http\Url\cms_hook_FriendlyUrl::furlDefinition()
#6   \init.php(902) : eval()'d code(35): IPS\Http\Url\_Friendly::createFriendlyUrlFromComponents(Array, '')
#7   \system\Http\Url.php(264): IPS\Http\Url\cms_hook_FriendlyUrl::createFriendlyUrlFromComponents(Array, '')
#8   \init.php(902) : eval()'d code(25): IPS\Http\_Url::createFromString('https://localho...', true, true)
#9   \system\Request\Request.php(275): IPS\Http\cms_hook_Url::createFromString('https://localho...', true, true)
#10  \system\Log\Log.php(106): IPS\_Request->url()
#11  \system\Data\AbstractData.php(108): IPS\_Log::log('Could not write...', 'datastore')
#12  \system\Data\Store.php(245): IPS\Data\_AbstractData->__set('languages', Array)
#13  \system\Lang\Lang.php(104): IPS\Data\_Store->__set('languages', Array)
#14  \system\Lang\Lang.php(122): IPS\_Lang::getStore()
#15  \system\Lang\Lang.php(225): IPS\_Lang::languages()
#16  \system\Dispatcher\Front.php(483): IPS\_Lang::autoDetectLanguage(Array)
#17 \system\Dispatcher\Front.php(39): IPS\Dispatcher\_Front->checkCached()
#18 \system\Dispatcher\Dispatcher.php(110): IPS\Dispatcher\_Front->init()
#19 \index.php(13): IPS\_Dispatcher::i()
#20 {main}

  Quote

Could not write to Store-FileSystem (furl_configuration)

As the error says, the script wasn't able to write the file to your filesystem. Check the permissions for the /datastore folder (either 777 or 755; depending on your server configuration). If permissions are okay check that you still have space available on your server.