I had problems sending invoices directly from invoice ninja. The test in the email settings configuration show that the test was sent and I received in the email. However, when I sent the invoices nothing happens. There is no message of success or something like that. After clicking on send email the popup page stay there and them disappear.
I have the Invoice Ninja - v4.5.18 installed using Softaculous.
What can I do to fix this problem?