I get 0 errors and 6 warnings for each event
warnings mean: "This field is recommended. Please enter a value, if possible!
So if it's not possible, let it!
If you have the possibility to enter via ftp, look into the code e.g. of event detail view:
you will find some itemprop="name" inside of classes e.g.
<dd class="jem-title" itemprop="name">
So you can classify microdatas with the rules of
" You can find the rules there too.
Perhaps you can add some microdata in the same way, e.g. you have big images you could classify like that too.
I am not an expert nor a programmer, but this should work! Perhaps others know it better. Then help or you will be an expert then. Good Luck G
on JEM 2.3.0 stable in latest Joomla (3.9.16) Protostar php7.4.1