Solved: Re: AEMaaCS - Error Handling using the acs-aem-com... - Adobe Experience League Community - 429210
ACS Error Handler redirecting to random page, and sometimes switches to the correct 404 page · Issue #1214 · Adobe-Consulting-Services/acs-aem-commons · GitHub
ACS AEM Commons Error Page Handler - Adobe Experience League Community - 199647
Error Page Handler
Adobe AEM 6.3 - Creating a Project with LazyBones - Missing acs-commons errors - Stack Overflow