Tekkit Server issue

[KinqKone]

Hello guys!

First of all sorry for the wrong topic I know its not Tekkit but Tekkit Servers however I cant select Tekkit Servers as a topic for some reason. But now to my problem: Each time I try to load up the Tekkit server https://www.technicpack.net/modpack/tekkitmain.552547 I get an error message which causes other players not being able to join my server. However I am able to join it. I have already installed Java 8 and tried like other users deleting the dim door mod. Nothing seems to work for some reason. As you can see in my log of the console it seems to be some kind of issue with the Buildcraft mod... https://pastebin.com/3wF6KCN5

Thanks for your help!

[JaariAtmc]

That's a log that shows a running server. The buildcraft stuff is just the old version checker failing.