discord bot relevant error output

Loaded extension welcome
Loaded extension rules
Loaded extension members
Loaded extension stats
Loaded extension student
Loaded extension mute
Loaded extension help

Traceback (most recent call last):
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/bot.py", line 863, in invoke
    await ctx.command.invoke(ctx)
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/core.py", line 728, in invoke
    await injected(*ctx.args, **ctx.kwargs)
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/core.py", line 88, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: AttributeError: 'Bot' object has no attribute 'say'
Ignoring exception in command unload:
Traceback (most recent call last):
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/core.py", line 79, in wrapped
    ret = await coro(*args, **kwargs)
  File "bot.py", line 49, in unload
    bot.unload_extension(extension_name)
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/bot.py", line 653, in unload_extension
    raise errors.ExtensionNotLoaded(name)
discord.ext.commands.errors.ExtensionNotLoaded: Extension <discord.ext.commands.context.Context object at 0x7f411c2fab70> has not been loaded.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/bot.py", line 863, in invoke
    await ctx.command.invoke(ctx)
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/core.py", line 728, in invoke
    await injected(*ctx.args, **ctx.kwargs)
  File "/home/ubuntu/TryHarder/bot-env/lib/python3.5/site-packages/discord/ext/commands/core.py", line 88, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: ExtensionNotLoaded: Extension <discord.ext.commands.context.Context object at 0x7f411c2fab70> has not been loaded.