@christian_fabre said in No drop-down list on Entity Attribute in "Creation Rule Sets" interface:
2- I changed browser, I used Microsoft Edge and miraculously it works and the Entities dialog box opens correctly.
Thank you for your help ...
but why Google Chrome which is my favorite browser does not work ...
I note that you're using a beta version of Chrome, which may contain bugs. I tried installing the same beta version, and it worked fine for me, as does the current release version (stable, for Windows). But if Edge works for you, that also suggests the issue is specific to your browser instance.
Again, you need to check Chrome's configuration settings to make sure that pop-ups are explicitly not blocked for the IP address of your host. In Chrome settings, search for "pop-up" to find this configuration area. Failing that, I would try purging all site data and caches in Chrome's "Privacy and Security" settings, and do "Reset Settings" at the root of Chrome's settings.