Ugdhar

It looks like you may have 2 versions of the same mod in your mods folder. Make sure when you update a mod, that you remove the old one after putting the new one in there. Also, make sure you are downloading mods from curseforge or the developers websites, other websites like 9 minecraft and stuff are bad, check out https://stopmodreposts.org/ for more information on which sites to avoid if you are unsure.

Get ahold of the server logs for a period of time that the problems are happening, and post them to github/pastebin or something, and post the link here.

So just a heads up, you should not repost .jar files for mods that you did not write. Simply giving us the names of them would have been sufficient. In order to update those mods, you would have to first see if the mod author(s) will/have updated them. If not, and/or they have no intention of doing so, you would then need to ask permission to update their code to 1.12.2. Depending on how they have their original sources setup, this may or may not be required, but is a good practice regardless. And of course, you will need to know Java fairly well, and be at least somewhat comfortable coding forge mods in order to update these mods, considering how much has changed from 1.7.10 - 1.12.2. If you were looking for a simple answer, (i.e. you are not a programmer) the simple answer is: you can't.

TBH most of the tutorials I've seen are crap, and/or just a "here, type this to make this thing", and then copy paste code. Most tutorial writers run out of steam once they've covered the simple things every tutorial writer covers, so they're mostly all the same anyway, video tutorials being the worst IMO. If you know Java (I'm assuming you do), just setup a workspace (the forge docs for 1.12 work for this), and start tinkering. Looking at the vanilla code is a good resource, and you can always find open source projects on github (quality may vary). When you run into issues, just make sure you have a working github repo of your project, and post logs and as much detail about your issue as possible when looking for help. Make sure to include what you are trying to accomplish as an end result, that can often help people give you a better (or the right) way of doing things. And of course, if you do not know Java, learn Java first, because you will have difficulties otherwise, and the people on these forums are not keen on teaching people Java (don't blame them).

First, you should make your own thread for your problem, and post logs to give more detail into what is going on. Secondly, this post is 3+ weeks old, for an old version of forge for 1.14.4, there have been many updates since then, so if you're still using .11, then update!

It sounds like you may have broken your .jar file association. I believe there's a tool called jarfix (search google) that will re-associate them with java.

Did you scroll all the way to the bottom of the version list? Sounds silly to ask, but just making sure!

Still there. After you try it, scan through the log to see if it mentions Optifine, if it's still there, then it's not gone.

You added Optifine for 1.12.2, but did not remove the one for 1.8.9

Since you're using Minecraft 1.12.2, I would say most definitely. If it still crashes, post the new logs.

You should post full logs, it should give a little more detail about what's going on.

Are you using Optifine? If so, try removing it. I searched the forums for "java.lang.NoClassDefFoundError: bnk" and that was one of the suggestions I saw.

You need to use java 8 for 1.12.2, java -version should show which version you're running.

I believe there is an optifine for 1.14.4, but it is not compatible with forge, it does its own thing to add itself to Minecraft.

Please give details on how you are starting the server, as well as posting logs.

You need to give it more ram, 1GB isn't enough. Make sure you have 64 bit java.

I believe you can edit your original post, and add [SOLVED] or something to the title.

Please post your log on github or pastebin or something. The way it's highlighted and formatted on here, it's impossible to read unfortunately

Certainly! Never know when it might help someone else searching the forums for answers!

1.8.9 is no longer supported due to its age. In order to receive support on this site you need to be using a recent version of Minecraft, I believe 1.12+ If you update and still have the problem, please provide screenshots of your launcher, as well as the dropdown that shows the versions of MC/forge available.

I would guess you need to install a newer version of forge per the crash report. Give that a go (make sure to update the profile/installation) and see if it helps.

1.7.10 is no longer support on these forums due to its age, you will need to update to a newer version (1.12+ I believe) to receive support.

https://www.curseforge.com/minecraft/mc-mods Make sure you filter for mods for 1.14.4, and also watch out for Fabric mods, as they do not work with forge.

Minetest might be something to check out (http://www.minetest.net) for what you're trying to do. It's open source C++, with lua scripting for a lot of things. I don't think of it as a minecraft replacement or anything, as it has different features than minecraft, and being an open source project, in many ways is a lot less polished. But it's very moddable, and worth checking out.