Stuck in "please enter tftp Server"

[Jas0n0ss]

client machines stuck in please enter TFTP server: and I try to enter pxe server IP , It just can't type in anything, It just stcuk in there (My keyboard is 100% OK)

I can read some log info from pxe server:

5:04:45 PM DHCPc:discovering for another DHCPd on LAN
5:04:45 PM ROOT=E:\AIO\
5:04:45 PM DHCPd 192.168.1.9:67 started...
5:04:45 PM DHCPd 192.168.1.9:4011 started...
5:04:45 PM TFPTd 192.168.1.9:69 started...
5:04:46 PM HTTPd:80 started...
5:04:50 PM DHCPc:another DHCPd detected on your LAN @ 192.168.1.1
5:06:37 PM DHCPd:DISCOVER received, MAC:04-D9-F5-60-47-E0, XID:88804A9A
5:06:37 PM DHCPd:OFFER sent, IP:0.0.0.0, XID:88804A9A
5:06:41 PM DHCPd:REQUEST discarded, MAC:04-D9-F5-60-47-E0, XID:88804A9A
5:06:41 PM PDHCPd:REQUEST received, MAC:04-D9-F5-60-47-E0, IP:192.168.1.4, XID:D823972E
5:06:41 PM Proxy boot filename empty?
5:06:41 PM PDHCPd:DHCP_ACK sent, IP:192.168.1.4:4011, xid:D823972E
5:06:42 PM TFTPd:DoReadFile:ipxe64.efi B:1468 T:1064704
5:06:42 PM TFTPd:DoReadFile:ipxe64.efi B:1468 T:0
5:06:48 PM DHCPd:DISCOVER received, MAC:04-D9-F5-60-47-E0, XID:925CBD5B
5:06:48 PM DHCPd:OFFER sent, IP:0.0.0.0, XID:925CBD5B
5:06:48 PM DHCPd:REQUEST discarded, MAC:04-D9-F5-60-47-E0, XID:925CBD5B
5:08:45 PM DHCPd:REQUEST discarded, MAC:70-1A-B8-55-67-C0, XID:E9E6E4D7
5:08:58 PM DHCPd:REQUEST discarded, MAC:70-1A-B8-55-67-C0, XID:8E69C389
5:09:15 PM DHCPd:REQUEST discarded, MAC:70-1A-B8-55-67-C0, XID:145E4B3B

anyone encounters this kind of error before ? any solutions & any ideas? much appreciated any useful tips.