M1 Mini not connecting to Intel Mac Mini OSX Server

M1 Mac Mini will no longer connect to Intel Mac Mini setup with OSX Server. About a year ago I setup an old Intel Mac Mini with OSX Server and was able to connect from my M1 to file transfer and even setup Time Machine to backup to it. The past couple months my M1 will no longer connect to the Intel as a server. I can connect from M1 to Intel via Screensharing just fine, I can ping the Intel from M1, and the Intel even shows up in Network, but not Server. Both on same LAN and File Sharing etc setup. Like I said, it connected fine up until a couple months ago. Any ideas?

Intel Mac Mini Specs (mid 2011):

OS 10.13.6 (High Sierra)

2.3 GHz Intel Core i5

16 GB RAM

Static IP

M1 Mac Mini Specs:

OS 14.4.1 (Sonoma)

8 GB RAM

DHCP Automatic