Error when editing users RT4.4.x

Following the DST timezone change from BST to GMT, RT is throwing an error when trying to modify RT users.

(Even the root user can’t edit, just get error: An internal RT error has occurred. Your administrator can find more details in RT’s log files.)

In the log, I get this:

    Oct 27 15:47:10 support RT: [8722] Error during compilation of /usr/share/request-tracker4/html/Elements/SelectTimezone:#012Loaded DateTime::TimeZone::Africa::Abidjan, which is from a different version (2020d) of the Olson database than this installatio
n of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Accra, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Algiers, which is f
rom a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Bissau, which is from a different version (2020d) of the Olson database than this installation of DateTime:
:TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Cairo, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Casablanca, which is from a diffe
rent version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Ceuta, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2
020a).#012Loaded DateTime::TimeZone::Africa::El_Aaiun, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Johannesburg, which is from a different ve
rsion (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Juba, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#0
12Loaded DateTime::TimeZone::Africa::Khartoum, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Lagos, which is from a different version (2020d) o
f the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Maputo, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded Date
Time::TimeZone::Africa::Monrovia, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Nairobi, which is from a different version (2020d) of the Olson
 database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Ndjamena, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::Tim
eZone::Africa::Sao_Tome, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Tripoli, which is from a different version (2020d) of the Olson database
 than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Africa::Tunis, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Afric
a::Windhoek, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Adak, which is from a different version (2020d) of the Olson database than this ins
tallation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Anchorage, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Aragu
aina, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Buenos_Aires, which is from a different version (2020d) of the Olson database t
han this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Catamarca, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::T
imeZone::America::Argentina::Cordoba, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Jujuy, which is from a different version (2020d
) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::La_Rioja, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a
).#012Loaded DateTime::TimeZone::America::Argentina::Mendoza, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Rio_Gallegos, which is
from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Salta, which is from a different version (2020d) of the Olson database than this installation
of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::San_Juan, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argen
tina::San_Luis, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Tucuman, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Argentina::Ushuaia, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Asuncion, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Atikokan, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Bahia, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Bahia_Banderas, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Barbados, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Belem, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Belize, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Blanc_Sablon, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Boa_Vista, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Bogota, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Boise, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::America::Cambridge_Bay, which is from a different version (2020d) of the Olson database than this installation of DateTime::TimeZone (2020a).#012Loaded DateTime::TimeZone::Americ

Happens on my dev install of Debian + RT as well. Restarted the web server and also rt4-fcgi and i
t seems to work again now.