It's a bad feature of Arma. You will usually find that the error is shown via the chat messages upon connection.
Unfortunately, Arma doesn't tell you what that message is.
You often need to find someone who is already on the server to tell you what that error message is.
(There might be a case where this is not the case, but it is very common that it does show the message in game.
Is your in-game name the same as your forum name? I cannot find any mention of you in the server logs.
Using the TacBF Launcher will most often solve this problem for you. Note: the latest Launcher allows you to reuse addons from other folders outside of "Arma 3\Tactical Battlefield\" now.
Also check in the MP Server Listing screen. Highlight/select server EU1.
Then examine the mod list in the bottom right for any red indicator icons, or in the server name row itself.