BT@HM

Thanks for all your help @diesieben07, much appreciated.

Well, I deleted the Replay mod and now Forge is booting perfectly, so thanks for that. Still a bit annoyed about the Replay Mod situation, I really need it for a project I'm working on.

[redacted link to copyright infringing site] You're right. The official Replay Mod site is down currently.

Hope this is what you're were talking about fml-client-latest.log

Hi, I'm trying to install forge 1.12.2. I am running Minecraft 1.12.2 and I'm running the latest version of the client. I downloaded the recommended version of forge (1.12.2 - 14.23.2.2611), I ran it. It said that it had installed itself within the Minecraft client. I opened MC. I selected Forge from the drop down menu and hit run. I was then greeted with this. I closed MC. I removed the Forge file and downloaded the Latest version (1.12.2 - 14.23.2.2618) but the result was the same. I then downloaded the Universal versions, first for the Recommended and then when that didn't work, for the Latest. Same result. I am at a loss about what to do. Can anyone please help. Thanks.