Two things to check:1. Delete the jcrPauseInstallation folder if you see under /system/sling/installer/jcr2. Check for error in error.log when deploying your code.
I think its due to missing div wrapper elements component inclusion in design mode.Try adding extra div elements around component where you are including it in html
I havent see this error as of now. Did you observe this after SP2 install?Is the OOTB text component? Can you try to install and verify on AEM 63 + SP1 once?
Did you followed these two documentations for package inclusion:-https://adobe-consulting-services.github.io/acs-aem-commons/pages/maven.html https://github.com/Adobe-Marketing-Cloud/aem-core-wcm-components#include-core-components-as-subpackage-into-your-own-project-maven-build