Email doesn't send when sending from profile

Email doesn't sent when sending from profile of other user and not logged in before sending. The loading wheel in the sending button never ends. Email doesn't arrive in the inbox. Think there is no evidence visible in the log of trying to send email.

Summary

Steps to reproduce

go to any userprofile. not logged in. write message. click send. log in in subsequent modal. -> mail doesn't send.

What is the current bug behavior?

Endless wheel of death.

What is the expected correct behavior?

What do you think it is !?!

Relevant logs and/or screenshots

Possible fixes