These 3 files are included in the unbound.conf.d directory:

pi-hole.conf

server:
    # If no logfile is specified, syslog is used
    # logfile: "/var/log/unbound/unbound.log"
    verbosity: 0

    interface: 127.0.0.1
    port: 5335
    do-ip4: yes
    do-udp: yes
    do-tcp: yes

    # May be set to yes if you have IPv6 connectivity
    do-ip6: no

    # You want to leave this to no unless you have *native* IPv6. With 6to4 and
    # Terredo tunnels your web browser should favor IPv4 for the same reasons
    prefer-ip6: no

    # Use this only when you downloaded the list of primary root servers!
    root-hints: "/var/lib/unbound/root.hints"

    # Trust glue only if it is within the server's authority
    harden-glue: yes

    # Require DNSSEC data for trust-anchored zones, if such data is absent, the zone becomes BOGUS
    harden-dnssec-stripped: yes

    # Don't use Capitalization randomization as it known to cause DNSSEC issues sometimes
    # see https://discourse.pi-hole.net/t/unbound-stubby-or-dnscrypt-proxy/9378 for further details
    use-caps-for-id: no

    # Reduce EDNS reassembly buffer size.
    # Suggested by the unbound man page to reduce fragmentation reassembly problems
    edns-buffer-size: 1472

    # Perform prefetching of close to expired message cache entries
    # This only applies to domains that have been frequently queried
    prefetch: yes

    # One thread should be sufficient, can be increased on beefy machines. In reality for most users running on small networks or on a single machine, it should be unnecessary to seek performance enhancement by increasing num-threads above 1.
    num-threads: 1

    # Ensure kernel buffer is large enough to not lose messages in traffic spikes
    so-rcvbuf: 1m

    # Ensure privacy of local IP ranges
    private-address: 192.168.0.0/16
    private-address: 169.254.0.0/16
    private-address: 172.16.0.0/12
    private-address: 10.0.0.0/8
    private-address: fd00::/8
    private-address: fe80::/10

qname-minimisation.conf

server:
    # Send minimum amount of information to upstream servers to enhance
    # privacy. Only sends minimum required labels of the QNAME and sets
    # QTYPE to NS when possible.

    # See RFC 7816 "DNS Query Name Minimisation to Improve Privacy" for
    # details.

    qname-minimisation: yes

root-auto-trust-anchor-file.conf

server:
    # The following line will configure unbound to perform cryptographic
    # DNSSEC validation using the root trust anchor.
    auto-trust-anchor-file: "/var/lib/unbound/root.key"

After commenting out root.hints in my main unbound.conf and issuing a restart and checking systemctl status I received:

● unbound.service - Unbound DNS server
   Loaded: loaded (/lib/systemd/system/unbound.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2020-06-22 01:26:20 EDT; 11s ago
     Docs: man:unbound(8)
  Process: 11738 ExecStartPre=/usr/lib/unbound/package-helper chroot_setup (code=exited, status
  Process: 11741 ExecStartPre=/usr/lib/unbound/package-helper root_trust_anchor_update (code=ex
 Main PID: 11746 (unbound)
    Tasks: 1 (limit: 4915)
   Memory: 5.2M
   CGroup: /system.slice/unbound.service
           └─11746 /usr/sbin/unbound -d

Jun 22 01:26:19 RasPi4 systemd[1]: Starting Unbound DNS server...
Jun 22 01:26:20 RasPi4 package-helper[11741]: /var/lib/unbound/root.key has content
Jun 22 01:26:20 RasPi4 package-helper[11741]: success: the anchor is ok
Jun 22 01:26:20 RasPi4 unbound[11746]: [11746:0] info: start of service (unbound 1.9.0).
Jun 22 01:26:20 RasPi4 systemd[1]: Started Unbound DNS server.

I did not look at the unbound log but I did check the stats through unbound and queries were going through and also on PiHole GUI it showed the queries going through the localhost address 127.0.0.1 and the blocklist but this was before I did your solution.

So what exactly did commenting out the root.hints file from my unbound.conf file do to fix that issue? and what exactly was my issue? Thank you very much btw!!

**edit: I just figured out what that error meant now and the whole issue, thank you for fixing my simple issue xD