Are all bundles active?

Add a class on this line -<div data-sly-list="${elements.content}">like<div clas="testclass" data-sly-list="${elements.content}">in your css file add below code-.testclass {  text-align: center;}

Could you please add the log files and if any console errors here..

Could you please upload one of the asset.As i am not able to reproduce it , it doesnt matter whether you are running with Mongo DB.

USe ROME API-https://www.javaworld.com/article/2077795/manage-rss-feeds-with-the-rome-api.html Refer below thread for pom changes-Custom RSS feeds Problem using Rome for RSS

instead of including script like above as it's not the correct way of including js files , could you try something like below in your jsp file-<ui:includeClientLib categories="cq.jquery"/> The category will be your clientlib folder.For more details refer below-Using Client-Side Libraries

In your java class you can convert the data to json using GSON and send back to frontend -Gson().toJson("data");

If it's minified then we can't do anything in aem rather you need to first convert it using some tool i thought it's not minified rather aem is minifying it.

If you enable debug checkbox then individual files you can see in console-Now access the page like below-http://localhost:4502/content/we-retail/ca/en.html?debugClientlibs=true You will be able to see individual files in console as below-If they are coming in minified version uncheck minify checkbox...

Please update below configuration so that files will not be shown in minified version-Post which if you will load your page clientlibs won't be in minified version.