Today during our transactions we attempted to email a client their invoice.  We have been doing this just fine for years.  To my knowledge there are no new updates (all are current) with my computer or for QB.  Just to be sure, I checked update status, and even uninstalled and reinstalled QB.  We are using QB Pro 2020, desktop version, on one computer only, not cloud based.  When we click on send for emailing invoice, the program temporarily freezes and then completely disappears and logs us out.  Crash.  No message.  Have seen posts about this in 2020 but we have not experienced this ever.  Using MS Office 365, Outlook email.  Tried customer support, they instructed me to check on some email settings under Preferences, but when I even tried to click on a setting in preferences / send reports.....it keeps crashing.  Computer is otherwise working fantastic.  Was told by online chat support that I would have to pay more for a Plus subscription to get this help.  Infuriating, we pay already and we are an active subscription.