Thanks – have just tried both those things but getting same thing – I also updated my original post as it is both PC and mobile. I also got this error when trying to deactivate and reactivate the plugin:
Fatal error: Cannot redeclare class EasyImageCollage in /var/www/vhosts/43/388491/webspace/siteapps/WordPress-89743/htdocs/wp-content/plugins/easy-image-collage/easy-image-collage.php on line 14
What I have just tried now is reuploading the images to the first few collages and they seem to be working fine – so maybe I just have to reupload each collage and hope it doesn’t happen again ??