I've been having trouble with FME 2018 and database connections. I don't want to move to 2019 because my company's FME server is 2018. FME 2018 build 18552 works on my other machine which has previous versions of FME installed. I've been working with a previous post with no success:
https://knowledge.safe.com/articles/65806/workarounds-to-known-issues-in-fme-2018x.html
Any other ideas?