DaemonUmbra

Sounds like you either don't have Java installed or another program has hijacked the file association. If you have Java installed try this: https://johann.loefflmann.net/en/software/jarfix/index.html

DamageIndicators is broken

What website? Give a URL.

Update to the latest version of Java 8. https://adoptopenjdk.net

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 have too many mods, you're running out of IDs. Remove some mods.

Something's screwing with file permissions, we can't exactly tell what.

No, it's not. You need to use Java 8, 9, or 10 with 1.14.4. Java 11 isn't supported yet pending a library update.

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

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.

1.8.9 is not receiving updates at all. Update to a more modern version of the game if you want to benefit from active development.

What icon is on the installer? Can you provide a screenshot?

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

Why are you trying to run Gradle in offline mode?

Duplicate threads merged.

Removed Optifine and why do you have 12 Gigs allocated to Minecraft?

Remember you need to go into your launcher profile/installation and change the Forge version, merely installing the right Forge version doesn't tell your game to use that version of Forge.

Check the Pixelmon website and use the version of Forge that pixelmon is designed to run with.

Are you saying you're trying to use the Unnamed Profile? Ignore it, make a new profile/installation in the installations tab.

Notes is broken/poorly made, please complain to the mod author.

Where did you download Forge from and did you rename it?

Was the launcher open when you ran the Forge installer?

Do you have Java installed?

Don't necro, especially for old versions that we no longer provide user support for.