Sending e-mail does not work

I have this problem when I send an email ??

Well I do not know how you installed InvoicePlane but this error only happens if you use the raw version from Github. Please download the package from the website.

Thank you

I downloaded version 1.5.3 of the invoiceplane website

Hello @Kovah
Help me please I always have this problem.

Please update to 1.5.5