If mods are programmed to identify themselves properly, mods that don't need to be on one of the sides with be automatically ignored by Forge, so it's good practice to have them all on both sides.
First off, it looks like you are running a 1.7 mod with 1.8.9 and I couldn't find a curse forge link to the mod in google so I would be careful about where you downloaded it from.
Also when he said to post it in a spoiler he meant to copy paste the text from the logs into a spoiler not upload the log into one.
1) Please post your log in a spoiler (click the eye icon when posting), not as an attachment
2) Thats a vanilla log, please make sure you posted the correct log & are running forge