I cannot join my modded 1.12.2 server

[sprick12]

Okay so for the past 2 hours i set up my 1.12.2 modded server its working now and is booted up but there is one problem I cannot join every time i try to join it works for a milla second then i get kicked with the message *Illegal client* and i dont know how to fix it i have all the same mods on my client and on the server i will include a screen shot of the message, If you have any questions feel free to ask Thank you for the help.

[coderboy_yt]

well what mods are on server/client

some server mods block players with mods with no config

[sprick12]

1 minute ago, coderboy_yt said:

well what mods are on server/client

some server mods block players with mods with no config

What mods would that be? I have a total of 105 mods installed on the server and client.

[coderboy_yt]

oh no. ohhhhhhhhhhhhhhhhhhhhhhhh no. youre gonna have a VERY bad time searching for the possibly single mod.
most definitley client side mod blocking.

[sprick12]

Just now, coderboy_yt said:

oh no. ohhhhhhhhhhhhhhhhhhhhhhhh no. youre gonna have a VERY bad time searching for the possibly single mod.
most definitley client side mod blocking.

Well i guess im kinda screwed then

[sciwhiz12]

1.12 is not supported on this forum.

Please update to a modern version of Minecraft to receive support.