+1 – Same error.
Could you just add a isset() or something before those code error or indicate how we can contribute to fix those errors. It breaks some others plugins.
Before ask why I am using Error reporting turned on, it is because I need to develop and test plugins and wordpress codes before deploy. So, I can not develop and use your plugin to make basic tests at the same time, without use more than one environment, to see wp and all other plugins working together.