DaemonUmbra

When in doubt, save rather than open. In this case you're telling your computer to use IE to open/run a Java jar file, this sounds to me like you don't have Java installed

That's such a generic exception though, can you provide debug.logs from both server and client?

Please provide a screenshot of the profile list

1.7.10 is no longer supported on this forum due to its age. Please update to a modern version of Minecraft to receive support.

You’d need to provide debug.log for me to have any chance of determining that

What Launcher are you using? Please provide a screenshot

Please provide debug.log using one of the paste sites listed in my signature, then

You have several mods that require a more recent version of Forge

You installed a deobf version of DynamicTrees...

Please provide your installer log

Are you sure you sent the correct log?

If it exists, delete .minecraft/libraries/org/ow2/asm-all/asm-all-5.2.jar and try again

I gave you a specific section to look at that said nothing about java -jar, I don't know why you went beyond that and confused yourself. Delete .minecraft/config/fml.toml

...what? Be specific

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

What about it made no sense?

Please read the Logs section of my signature below and provide the appropriate log in the appropriate manner.

Run this once and try again.

From that it looks like the jar was downloaded

I don't know

All I can suggest is remove Optifine and give up on shaders

A single tick took over a minute, so your server killed itself

Ok, so it looks like Lemming published this mod without publishing the version of CoFHCore that supports ensorcellation, and didn't edit the mods.toml of ensorcellation to indicate that this mod has a minimum required version of CoFHCore

Please provide your installer log