Hi Frank,
Increase the WordPress memory limit.
Add this to wp-config.php. Start with 64M.
define(‘WP_MEMORY_LIMIT’, ’64M’);
If that doesn’t work increase to 96M, then 128M etc.
You can use FTP or your hosting company’s control panel file manager.
Here is a video using file manager.
If that doesn’t work at all, you may have to edit the .htaccess file (if your hosting company allows).
Do a google search on “increasing memory limit in .htaccess”.
Let me know if there is anything else I can do to help.
Jack