I think the issue solved ‘ítself’ - I upgraded to newest version op PRO - no help needed .Thanks
After a long time with no problems - the message of ‘the preview could not load’ happened again. I do not know how to correct this.
It happend after I created a copy of a Blog message in Dutch - made a kopie to English and put text in the English version. We did this before and all went well than.
I use PRO -
When opening a page - by Pro - content; you see the Dutch pages only
We did an upgrade to the new WP version. All seems to working well with that …
