Session errors on multisite.

Hello,

I cant seem to solve this.

We have two websites with 2 different store views. site one is www.shop.com. second site is www.site.shop.com. Magento version is 2.2.9

Was adding products and working on the website no problem for a few days, had 2 days off, came back to it and our second site is now showing:

There has been an error processing your request

Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /home/shop/public_html/vendor/magento/framework/Session/SessionManager.php on line 142

Error log record number: 1051481970402

That error log displays:

{"0":"Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /home/greenhea/public_html/vendor/magento/framework/Session/SessionManager.php on line 142","1":"<pre>#1 ini_set() called at [vendor/magento/framework/Session/SessionManager.php:142]n#2 Magento\Framework\Session\SessionManager->__construct() called at [vendor/magento/module-customer/Model/Session.php:168]n#3 Magento\Customer\Model\Session->__construct() called at [generated/code/Magento/Customer/Model/Session/Interceptor.php:14]n#4 Magento\Customer\Model\Session\Interceptor->__construct() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:111]n#5 Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:66]n#6 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#7 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:144]n#8 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:230]n#9 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:34]n#10 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:59]n#11 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#12 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:144]n#13 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:230]n#14 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:34]n#15 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:59]n#16 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#17 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:144]n#18 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:230]n#19 Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgumentsInRuntime() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:34]n#20 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->_resolveArguments() called at [vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:59]n#21 Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:70]n#22 Magento\Framework\ObjectManager\ObjectManager->get() called at [vendor/magento/framework/Interception/PluginList/PluginList.php:250]n#23 Magento\Framework\Interception\PluginList\PluginList->getPlugin() called at [vendor/magento/framework/Interception/Interceptor.php:119]n#24 Magento\Framework\App\Http\Context\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]n#25 Magento\Framework\App\Http\Context\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/App/Http/Context/Interceptor.php:78]n#26 Magento\Framework\App\Http\Context\Interceptor->getVaryString() called at [vendor/magento/framework/App/PageCache/Identifier.php:57]n#27 Magento\Framework\App\PageCache\Identifier->getValue() called at [vendor/magento/framework/Interception/Interceptor.php:58]n#28 Magento\Framework\App\PageCache\Identifier\Interceptor->___callParent() called at [vendor/magento/framework/Interception/Interceptor.php:138]n#29 Magento\Framework\App\PageCache\Identifier\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]n#30 Magento\Framework\App\PageCache\Identifier\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/App/PageCache/Identifier/Interceptor.php:26]n#31 Magento\Framework\App\PageCache\Identifier\Interceptor->getValue() called at [vendor/magento/framework/App/PageCache/Kernel.php:115]n#32 Magento\Framework\App\PageCache\Kernel->load() called at [vendor/magento/module-page-cache/Model/App/FrontController/BuiltinPlugin.php:71]n#33 Magento\PageCache\Model\App\FrontController\BuiltinPlugin->aroundDispatch() called at [vendor/magento/framework/Interception/Interceptor.php:135]n#34 Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/swissup/module-amp/Plugin/Framework/FrontController.php:48]n#35 Swissup\Amp\Plugin\Framework\FrontController->aroundDispatch() called at [vendor/magento/framework/Interception/Interceptor.php:135]n#36 Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]n#37 Magento\Framework\App\FrontController\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/App/FrontController/Interceptor.php:26]n#38 Magento\Framework\App\FrontController\Interceptor->dispatch() called at [vendor/magento/framework/App/Http.php:136]n#39 Magento\Framework\App\Http->launch() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:24]n#40 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:257]n#41 Magento\Framework\App\Bootstrap->run() called at [site.shop.com/index.php:39]n</pre>","url":"/","script_name":"/index.php"}

Cookies domains seem to be set right.

Thanks in advance for any help!