@contrid
The debugging was already on, but I switched it off and on again with an in between saving of the settings. The problem still apears. This is the information:
https://www.siering.nl/wp-admin/admin.php?page=slideshow-slides
Parse error: syntax error, unexpected ‘[‘ in /var/www/domains/siering.nl/www/wp-content/plugins/slideshow-gallery/includes/class.slide-list-table.php on line 319
https://www.siering.nl/wp-admin/admin.php?page=slideshow-galleries
Parse error: syntax error, unexpected ‘[‘ in /var/www/domains/siering.nl/www/wp-content/plugins/slideshow-gallery/includes/class.gallery-list-table.php on line 243
I cannot paste the screenshot but it only states the error above and is furtheron totally white.