I am guessing it is something to do with your configuration of XAMPP as one message is Joomla articles and the other is RokStories, which displays articles.
I never use local development, always a live server but behind a .htaccess password. That way I know the site will work when I make it live.
Hope this helps
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I use cPanel file manager to upload the zip file and then extract it on the server. Less chance of file corruption that way. Takes about 10 minutes.
For me, I cannot waste time building something that works perfectly on a local environment such as XAMPP etc. and then find something broken when it goes on the production server. By developing on the server I immediately see if anything breaks when I load an extension or change code.
Hope this helps
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information