You may want to contact support and discuss your install.  I was advised there was no Lacerte release that occurred yesterday.  Was it possibly a Windows update or browser update as opposed to your software?  Regardless, I would reach out to support 800-933-9999

No it was definitely a Lacerte update, although it is possible that the update was released earlier as we were out of the office on Monday and Tuesday.  We've tried reaching out to support, and even left a call back number today and two hours later never got a call back.

If you are using "hold my spot" to call you back, it must be a direct line, and can't have phone options, or you may not get the call back.  I would ensure you don't have any AV or firewall setting that would be trying to scan/stop Lacerte from running but to troubleshoot you would really need to contact support for additional assistance.