Pro activation leads to error 500 Post date Home › Forums › Calendar Products › Events Calendar PRO › Pro activation leads to error 500 This topic has 4 replies, 2 voices, and was last updated 8 years, 2 months ago by Support Droid. Viewing 1 post (of 1 total) Author Posts February 23, 2018 at 5:40 am #1461875 Support DroidKeymaster This support thread is private. Author Posts Viewing 1 post (of 1 total) The topic ‘Pro activation leads to error 500’ is closed to new replies. → Please verify your API key is correctly entered on the settings