DaemonUmbra

You downloaded which file from what URL?

Please provide your installer log, it will have the same name as the installer but with .log on the end: Installer: forge-{version}-installer.jar Log: forge-{version}-installer.jar.log Note: If you have Windows Explorer set to hide file extensions(as is the default setting), they will look like this: Installer: forge-{version}-installer Log: forge-{version}-installer.jar

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.

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

How did you install Forge?

How did you install Forge?

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

You're attempting to run RLCraft with about 1G, this is not going to work

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

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

Don't extract/unzip mods You appear to be mixing 1.12.2 and 1.14.4 mods, this is not going to work as mods are not typically compatible across MC versions (with the possible exception of bugfix versions) That does not look like a preview version of Optifine and at this time Forge compatibility is a preview feature in 1.14 Optifine

What kind of network are you on? and I ask this referring to both network quality and management (i.e. college wifi or something)

RLCraft is not a mod, it is a modPACK. Can I ask where you got the idea that this method of installation would work for a full modpack?

Don't make duplicate threads It sounds like you're telling Chrome to run the file instead of saving it, this is not what you want.

Please do not necro old threads, if you have an issue make your own and provide logs.

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

Whatever tutorial you're following, toss everything out and start over from a decent tutorial (look up McJTY's tutorial)

Mods aren't supposed to be executable, they are libraries. Where did you get the notion they are supposed to be?

Please provide your code as a GitHub repository

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.

How about you take all the mods you got from places other than CurseForge, toss them, and replace them with the same mods from CurseForge?

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

Is the repo you linked the mod you're having this issue with?

To me, so much of that build script looks like stuff that doesn't need to be done.