In reply to superspaceman230:
Looks like it might be Optifine.
Duplicate of Twitch won't install Minecraft
In reply to datchatbat:
Can you post the crash reports and logs?
In reply to AxolotlYT:
You do not open the '.jar' files to install them you put them in the 'mods' folder in '.minecraft'
To find your '.minecraft' folder look at this article by Mojang.
In reply to titan2thegiant:
It can take up to 48+ hours.
In reply to smilesr:
By tablet do you mean a Microsoft Surface? If so what model?
In reply to pootsiepal:
You can get it here.
In reply to superqwerty11112:
Are you talking about the mod packs?
In reply to aberrantdrone:
You need the server files.
In reply to tamadog56:
Do you mean the Twitch Launcher? If so you can get it here.
In reply to ehrenjaeger98:
There is a plugin called Random Spawn.
In reply to dinosaurslurpee:
What shaders are you trying to use and what are you system specs?
In reply to itzgrigon:
You need to install a different version of java.
In reply to Soggy_Pizza:
That's the same link that I provided.
In reply to gangsta_pandy:
Where did you download the mod pack?