I get a php warning for the serendipity_event_usergallery plugin. I have php 7.3. The php warning is [Tue Jun 23 10:46:34.462114 2020] [php7:warn] [pid 25309] [client 54.36.148.245:37370] PHP Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/serendipity/...

The thread from 'claudermilk' helped me to set up an embed blog in my homepage. It worked quite good except for a few problems after the chances. Maybe others had the same problems and are still looking for a solution. I try to write down what problems I had and how I solved them. 4 problems and sol...