NTS issue

Hi,

Running RHEL 8.5 with Chrony 4.1
Linux repo.x.local 4.18.0-348.23.1.el8_5.x86_64 #1 SMP Tue Apr 12 11:20:32
EDT 2022 x86_64 x86_64 x86_64 GNU/Linux
chronyd (chrony) version 4.1 (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP
+SCFILTER +SIGND +ASYNCDNS +NTS +SECHASH +IPV6 +DEBUG)

When I add these lines to chrony.conf, chrony crashes

server nts.netnod.se iburst nts
server ptbtime1.ptb.de iburst nts
ntsdumpdir /var/lib/chrony

The service crashes on
Apr 29 18:56:15 repo.x.local systemd[1]: Starting NTP client/server...
Apr 29 18:56:15 repo.x.local chronyd[5507]: chronyd version 4.1 starting
(+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +NTS
+SECHASH +IPV6 +DEBUG)
Apr 29 18:56:15 repo.x.local chronyd[5507]: Frequency -11.603 +/- 0.598 ppm
read from /var/lib/chrony/drift
Apr 29 18:56:15 repo.x.local chronyd[5507]: Using right/UTC timezone to
obtain leap second data
Apr 29 18:56:15 repo.x.local systemd[1]: Started NTP client/server.
Apr 29 18:56:16 repo.x.local chronyd[5507]: Fatal error : Could not
initialise priority cache : No or insufficient priorities were set.
Apr 29 18:56:16 repo.x.local systemd[1]: chronyd.service: Main process
exited, code=exited, status=1/FAILURE
Apr 29 18:56:16 repo.x.local systemd[1]: chronyd.service: Failed with
result 'exit-code'.

Removing the nts servers (and using only on pool 2.rhel.pool.ntp.org
iburst)  and restarting chrony makes everything work. I can not find
anything based on the error "Could not initialise priority cache" and no
references to priority cache anywhere

Thanks for any help that you can provide
-- 
Kind regards,
Met vriendelijke groeten,

Timothy Dewin