The title says it almost all.
I’ve upgrade to pro version today (latest version) and now I can’t POI to any maps: old (from easy version) or new ones, on old or new articles/pages, when I click on the loop next to the add POI text input box, the whole page reload, and nothing is added to my map.
We were right, it was another plugin.
I don’t really understand why it was working with free version and not with pro version.
Anyway, this plugin was no longer needed, therefore it solved the problem.