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These issues might occur as soon as you have followed the steps mentioned in "Setting up specific bots" page and try to run your bot for the first time:

Running yo hubot yields -> SyntaxError: Unexpected token ...

Upgrade your node and npm (Recommended: Node 8.x.x and npm5.x.x) and retry.

Reference: Click here

TypeError: Parameter 'url' must be a string, not undefined

You need to set the MONGO_DB_URL as an environment variable.

export MONGO_DB_URL=mongodb://<mongodb_host_ip>:<port>

After setting try restarting the bot with ./bin/hubot or ./bin/hubot -a <adapter> command.

Help command gives large/redundant outputs

Navigate to the myhubot/external-scripts.json file and remove hubot-help from the array. Thereafter, restart the bot.

Reload command is not responding

Navigate to myhubot/hubot-scripts.json file and add "reload-scripts.coffee" as an element in the array. Thereafter, restart the bot.

node/nodejs not found

Create a symbolic link between node and nodejs to fix any naming conflicts:

sudo ln -s /usr/bin/nodejs /usr/bin/node

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