Since I updated my template (YooTheme Pro) I can no longer create new articles using F2C from the front end.
The submission form displays but the save button does not respond.
I then changed the template of the submission page to a standard Joomla template (Bees) - and then it works fine.
I am using Joomla 3.9.3 and F2C 6.7.4
I read an article about captcha being responsible for a similar problem, but I am not using captcha