Since TB 115, I have issues with the "invite" functionality of Lightning, as follows. It generates errors as follows: * "invite" does not work. I can add emails to be invited to an event, but the invite is then not sent at least with the option "notify" + "send individual mail" (other alternatives such as open visible list of destinatories are not feasible due to privacy) * when opening an "event" from the calendar, it displays in a full-screen format (see screenshot_2) that lists all invited attendees * The "invite attendees" window works but has a strange pink block on top right (see screenshot_3) * the page where the format of sending ("notify", "send individual mails") is not accessible any more Currently the calendar as such works fine. But the "invite" function is critical for the use I am giving as transnational NGO to invite to meetings etc. All worked fine with previous TB versions. System config: WIN10 prof, all updates installed, fully licensed, AMD Ryzen 9 5900X etc. (mid-end system built in 2022). Thanks for looking into a solution. Klaus