using "load more" button - see only loading image .. no more pictures come

Hi ..
i insert about 25 - 30 pictures in an folder !
setting is to display 24 pictures at once

when i press the "load more" i see only the loading gif - but no more pictures will be loaded

also i have an problem with the show more button in picture - when i press it i see "The requested content cannot be loaded. Please try again later."

and how can i remove the "link" button / icon in pictures

best regards

Michael