ZeroTier stops working after "WARNING: unable to write to file" errors

Running on Rocky Linux 8, ZeroTier has been stopping, with nothing really in the logs except these errors. But these errors can persist for days before the issue occurs.

Here’s a log snippet - known issue? Any workarounds?

(not the actual file names reported in the logs)

Aug 13 22:25:43 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:26:43 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:32:03 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:33:08 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:34:08 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/peers.d/1234abcd.peer (unable to open)
Aug 13 22:34:09 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:35:14 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:36:14 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)
Aug 13 22:37:14 localhost zerotier-one[2777550]: WARNING: unable to write to file: /var/lib/zerotier-one/networks.d/1234abcd.conf (unable to open)