Problem writing email with email composer

Hello everyone! If I go to EMAIL -> COMPOSE NEW EMAIL for write an email to one of my leads or account (is the same) I have a problem… If I try to choose a template model from the dropdown nothing happens, and the text of the email remains empty.

The same happens if I select a recipient of the e-mail searching for it through the search (lead/account/etc.), I select a recipient but the recipient field remains empty and I am forced to write the recipient’s email address by hand.

Can you help me?

What is your SuiteCRM version?

Do you see any serious messages in your logs at the time of this event?

And in your browser’s developer console, any javascript errors?