Hello Cecilia
I believe the problem maybe that the plugin was auto updated and you didn’t see the caution notice that the plugin showed before updating to the latest version, Easy Custom Sidebars version 2.0.0
The caution notice stated that the Easy Custom Sidebars version 2.0.0 is not compatible with your current PHP version.
If you are running on PHP version 5.6 for example, the Easy Custom Sidebars version 2.0.0 plugin will not work.
If you update your PHP version to 7.4 the plugin works perfectly with an enhanced interface which makes it much easier to use.
Hope this helps
Ray
