For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
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I mean all the labels in first column, and all the respective details in the other columns.I think that you mean to show all the labels in the first row and all the respective details underneath them?
Where can i find this folder?You can try div template for list view.
In default.php file from div template folder you have some settings, which may set.
// The number of columns to split the list rows into
$columns = 3;
// Show the labels next to the data:
$this->showLabels = true;
// Show empty data
$this->showEmpty = true;