Your problem is that PHD2 isn't able to communicate with NINA via the network connection. Probably the first place to look is the firewall and Windows Defender settings for both NINA and PHD2. If you installed or re-installed PHD2 in a different location than before, I suspect the Windows firewall permissions will need to be done. Here are the relevant log entries:
12:39:06.255 00.637 23044 evsrv: cli 0D0828C0 connect
12:39:06.256 00.001 23044 evsrv: cli 0D0828C0 short write 0/144 Input / Output error
12:39:06.258 00.002 23044 evsrv: cli 0D0828C0 short write 0/89 Input / Output error
12:39:06.259 00.001 23044 evsrv: cli 0D0828C0 disconnect
Good luck,
Bruce