Hi,
I have no experience with Zerotier, but can confirm segfault on Omnia with the version from OpenWrt master and OpenWrt 19.07.
I just created upstream issue https://github.com/openwrt/packages/issues/12482 so maybe maintainer could help with idea what is going on.
I’m going to disable ASLR PIE for this package as a temporary workaround and @paja will have it on review. It will be part of Turris OS 5.0.4 and if you are using HBK/HBL/HBD branches, it will be available to you within a few hours after merging as those are automatic builds.
It is present in HBK build for about 2 hours now, there. In this case, there should be a possibility to install the package from HBK branch or you can wait until it gets to HBS, which is going to be this week.