In my vyos, the router DNS recursive forwarder failed to start, reporting the following error:
```
PowerDNS RJul 06 16:51:01 vyos pdns_recursor 4.3.1 (C) 2001-2020 PowerDNS.COM BV[25154]: Jul 06 16:51:01 Only one thread, no need to distribute queries ourselves
Using 64-bits mode. Built using gcc 8.3.0 on May 8 2020 10:46:59 by root@a0c22f941bd8.Jul 06 16:51:01 vyos pdns_recursor[25154]: PowerDNS Recursor 4.3.2 (C) 2001-2020 PowerDNS.COM BV
PowerDNS comes with ABSOLUTELY NO WARRANTYJul 06 16:51:01 vyos pdns_recursor[25154]: Using 64-bits mode. This is free software, and you are welcome to redistribute it according to the terms of the GPL version 2Built using gcc 8.3.0 on Jun 30 2020 21:56:22 by root@abda66eaec39.
Enabling IPv6 transport for outgoing queriesJul 06 16:51:01 vyos pdns_recursor[25154]: PowerDNS comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it according to the terms of the GPL version 2.
Cannot load Lua configuration: Cannot open file 'recursorJul 06 16:51:01 vyos pdns_recursor[25154]: Enabling IPv6 transport for outgoing queries
Jul 06 16:51:01 vyos pdns_recursor[25154]: Unable to load Lua script from 'recursor.conf.lua': STL Exception: recursor.vyos-hostsd.conf.lua': No such file or directorylua:7: Caught exception: Found . in wrong position in DNSName pve..
```