Hello,
it is very important to test this plugin sufficiently. The website owners do not notice this error until a customer reports that he has written an email. This can have far-reaching consequences. It cannot be that every update will be a gamble as to whether this plugin will still work. Please process this ticket with higher priority, because about 30 websites are affected for me. This problem seems to affect many of your customers. I'm very reluctant to use a third-party plugin as I really appreciate template and plugins coming from one provider. But I have to be able to rely on basic functionalities.
Best regards
Ingo