Hello

See the image i wupload i have rounded the corruopt image/button showing of preview how to fix that helpme plz

see this image https://postimg.org/image/869ilqtyp/

You should find the image in the path themes/default/images/ajax_preview.png. If it's not on your webspace it should be in the ZIP-file respectively the unpacked directory.

If you find it wether on the server nor in the local copy or ZIP, you can copy it from this forum (right click on the image=>save as).

Tschö, Auge