Cannot get a plan to complete to save my life

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/cannot-get-a-plan-to-complete-to-save-my-life/
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I have been using this tool for 5 years. A few months ago, I could not get a plan to work. I still cannot. I read the FAQ 1000 times. I am about to give up on this tool. Too many options, too complicated for a planning task.