Can you try installing this in your local and check if that is working fine in your local ? Also if it throwing error, just check the we-retail or install wknd project https://github.com/adobe/aem-guides-wknd in your local and check if those are loading fine ?
If yes, then the issue is with your project code.
We have fixed the issue by deleting the "outputcache" directory from the bundle248 from AEM repository file system.
Clientlibs associated bundle is Adobe Granite UI Clientlibs (com.adobe.granite.ui.clientlibs) - bundle248 under "aem/author/crx-quickstart/launchpad/felix/bundle248/data/outputcache".
After AEM restart - outputcache directory re-created and pages are accessible now.
Reference: https://experienceleague.adobe.com/docs/experience-cloud-kcs/kbarticles/KA-16543.html?lang=zh-Hans