Goodly

You can't use mediafire or google drive to host classicube texture packs or skins. They don't provide direct download links.

When you use a texture pack with a taller texture file, it will automatically increase the amount of texture ids. Please read my previous comment explaining the difference between texture and block IDs.

Remember that texture IDs and Block IDs are different things. Inf ID MCGalaxy allows you to add more than 255 blocks (up to 767) per map, so even if it worked you won't notice a difference unless you try to add a block using /lb add (in which case it should create the block at ID 767 with Inf ID, or ID 254 with default) By default you'll see 256 texture IDs and MCGalaxy versions will not change that. To get more texture IDs (512 total), you can double the height of the terrain.png in the texture pack.

123DMWM builds the absolutely latest version of inf-id MCGalaxy which you can find here https://mcgala.xyz/nightlies

You need to use the port that you're using for the server when connecting. Does 25565 rather than 90 work?

What method are you using to connect? If you're hosting the server on your own machine, you will need to correct using the Direct Connect menu, like this. You don't need to edit the bottom field.

Always make sure to give as much info as you can when asking for help! What was the error? Do you have screenshots of what happens when you try to log in? Can you paste the logs from the server? Otherwise we don't have a way of knowing what went wrong and it'll take longer for you to get a solution (as you're seeing now)

Issue has been resolved: block 68 was a LevelBlock (/lb) whereas block 67 was a GlobalBlock (/gb). Using /gb to remove 68 didn't work since only /lb could target it in that level

Are you absolutely sure you deleted 68? Is you server public so I can join to inspect the issue? If not, can you send me the files that are in the blockdefs folder and blockprops folder?

It looks like you may have mistyped the ID when toggling it as a message block. If a block isn't appearing in the menu make sure to reset its order by setting its order to its ID

The wiki has a page on this https://github.com/ClassiCube/MCGalaxy/wiki/Creating-levels

You should post pictures of what it looks like so people are more likely to try it

The Terms of Use for ClassiCube apply for any server you make public on ClassiCube. https://www.classicube.net/terms/

If you want to use javascript then your first step would be finding a server that allows javascript plugins or is written in javascript and open source

Do you have an idea of what language you want to use? Is it a server side plugin or a mod of the client itself?