Cant add events in calendar

New installation of OC 9.1.1, new installation of calender - when I try to add events the just don’t appea. n error msg in logs

Please use the bug tracker https://github.com/nextcloud/calendar/issues

I posted in github, though it doesn’t seem to be a support site,
I tried a change in app.js that I saw in another post there, about have “update button” (which I have also) - it didn’t work.
Any other recommendation where I can get help?

Github is normally for bugs and this forum is the right place for support. However, without error messages or clear indications of a wrong or missing configuration, there is not much we can do here. So let’s see if the developers manage to reproduce this error:

my browser log shows
jquery-migrate.min.js?v=8a51ba3…:2 JQMIGRATE: Migrate is installed, version 1.4.0

http://hc-edt.com/OC/remote.php/dav/calendars/kronos777/personal/ownCloud-h8f43e4vgbfgxmlq8y8gmbo6rg93pvf16m1eixf32oml8r529.ics Failed to load resource: the server responded with a status of 403 (Forbidden)

http://hc-edt.com/OC/remote.php/dav/calendars/kronos777/personal/ownCloud-zbw75gn7cx5p6gkqigsrr7ldiahsfalj1r7ah0hgqaxlrcc8fr.ics Failed to load resource: the server responded with a status of 403 (Forbidden)

I cant see these paths, and folder permissions are 0755 all around.

issue was related to mod_security, see mentioned issue