I can't put mods with pirate account

In the server we are 2 pirate players, and 2 legal players. We want to have mods and i've did some proofs in another server. When i put the mods in the server and on my Minecraft and i started the server, it did not let me in. I have activated all the options on server.properties, except for "Whitelist". The message on my Minecraft says "Failed to synchronize registry data from server, closing connection". In the Console says this: com.mojang.authlib.GameProfile@564b3dba[id=<null>,name=Benlly892,properties={},legacy=false]

I repeat, ALL the options, including Cracked are activated (except Whitelist), so i don't know why this is happening. The mods in singleplayer function perfectly, and i've checked that the mods on my Minecraft and on the server are the same.

I wish an answer and really sorry for my english, im from Spain.

Please someone help me !!!!

I've checked and all the mods are in the same version and the server too

LOG: https://mclo.gs/WZwPUtR

And where is the client log? thanks for help!!

Hi!! Thanks for the comments and trying to help me with this problem. I'm so idiot!!! Now i know what was the problem: the mods were not compatible. I tried deleting some mods and it functioned! I hope help someone in the same situation