I do not remember the version of EasyMail that I updated, but I suppose it is the one immediately before, because I regularly upgrade.
The last plugin I updated is EasyMail. This is why I quickly managed to get back to the cause by deactivating it. The day before I had also upgraded Yoast Seo.
For now it’s not a big problem, because I just reactivate EasyMail when I need it and then put it back to sleep. But something does not work properly.