Server side:
Debian GNU/Linux 10 (buster)
nginx/1.14.2
PHP:7.4
Wordpress Version: 6.1.1
The Events Calendar: 6.0.5
Theme: Betheme Versie: 26.6.5
client side
Broswer Firefox: 107.0.1 (64-bit)
OS: Ubuntu 22.04.1 LTS
as a workaround i set the location to nothing, then update, put the location back and update again. After that the update button is going nowhere.
looking forward to your solution