Hi,
thanks for your reply.
Decided to deactivate all my plugins and switched theme to WP 2017. Got the TablePress content to show up now on 2 sites (multi install), but still some problem on a third. So I will continue to detect the problem and what plugin to suspect.
Another question: I realize now that I have to index all sites that uses TablePress. Have you experienced any limits in regards of how many sites the index is capable of contain? Or maximum keywords in the index before there will be performance issues?
Br,
Hans