I won’t recommend to override the coralui3.css instead you can create your custom client libs css files to override the css properties and add those client line for the components for you want to override 

Can you trying the clean and build the project from eclipse. You will get this option from eclipse project menu, clean and then build. Try re-importing the project by deleting the project from workspace and check if you are now able to add the projects to server . Even after that it doesn’t works th...

do you see Maven project on top left in project explorer?

After click on finish does it add the server in workspace? And if yes then right click on server and click on Add and Remove. Add required modules on the server and click Finnish. make sure you have selected AEM perspective.  

Can you check with admin access . It might also happen because you don’t have permission to see those.

It seems your project import is not correct. Please confirm if you added the project in this way. In Eclipse, choose File > Import… In the Import Dialog, choose Maven > Existing Maven Projects, then click “Next”. If that the case can you please share the screenshot or try resolving this using htt...

Check the log for failed publishing it will give you the idea why it’s failing the publishing and also looks for the node permissions for acs commons list to be accessible by anonymous user

It seems this property “Asset Properties: Orientation/ Portrait' is not the ootb smart tags and I guess it’s coming as the part of trained smart tags. Can you check if you have this tags in your aem tags and if yes then it will confirm that it’s a trained tags. So try to train the smart content serv...

It seems that there is something wrong with configuration. It might require SMTP use SSL to be true. the log suggest that with this configuration it’s not able to connect to configured mail server.   https://experienceleague.adobe.com/docs/experience-manager-65/communities/administer/email.html?lang...

that’s the expected behaviour. If you made changes after scheduling it for publish later you have to republish it.