Automatic and manual e-mail failing

Hi, thanks for the plugin!

Unfortunately it isn’t working. E-mail test doesn’t work, automatic e-mail doesn’t work and trying to send it manually doesn’t work either.
I’ve already tryed both Background Process Engine options. There’s no difference.
Here’s the log:

2021-11-22T19:19:34+00:00 INFO Subscriber [email protected] successfully subscribed – 4844
2021-11-22T19:21:14+00:00 INFO Stock found for Product id 4804 and Background Process queued for 4844
2021-11-22T19:21:14+00:00 INFO Product id 4804 Instock Background Process started – Total: 1
2021-11-22T19:22:25+00:00 ERROR Failed to send Automatic Instock Mail for ID 4844 with [email protected]
2021-11-22T19:38:46+00:00 ERROR N?o foi possível enviar o e-mail de retorno ao estoque para o e-mail [email protected] 4844
2021-11-22T19:40:25+00:00 ERROR N?o foi possível enviar o e-mail de retorno ao estoque para o e-mail [email protected] 4844

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