Daily build does not work, how to report?

I have been running master~2019-03-02_23.38.22_LibreOfficeDev_6.3.0.0.alpha0_Linux_x86-64_deb.tar.gz for near two months and it resolved some issues I have. The download was 178.9 MB. Yesterday I downloaded a later version master~2019-04-26_14.20.06_LibreOfficeDev_6.3.0.0.alpha0_Linux_x86-64_deb.tar.gz It is much smaller, but still 42 files. Only 96.8 MB. It does not work. Calc will not start. That version is still out there today and so I thought I would report it. We are asked to test. But I find no info on how to report a problem with the build. I don’t think it iss a bug in the code but the way the build was put together I’m guessing. How do I report this. Its location is https://dev-builds.libreoffice.org/daily/master/Linux-rpm_deb-x86_64@86-TDF/2019-04-26_14.20.06/
Or have I went to the wrong place?

Thank you for testing!

Problems that you find when testing daily builds, that are bugs in the program, should be reported normally - to bug tracker.

Problems of packaging, like incomplete builds, please report to #tdf-infra IRC channel at FreeNode.