If you encounter issues while working with the IDEA plugin, please report them to Jira in PFAUT project. Partners or customers can raise a ticket to the Support portal. If possible, add a screenshot or attach the IDEA log file to the message. The log file is located at Help > Show Log in Files/Explorer/Finder; idea.log is the current log file.
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Why Auto-completion Is Not Working?
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If you see "Error: Empty Key" in the fetch panel, then your config.groovy was created in a wrong way in the past. Just replace the part representing the Two-Factor Management key in config.json – replace '' (empty String) with null. It is the last field of the array of connection details.
IntelliJ IDEA General Troubleshooting
If IDEA is behaving strangely, there is a magic fix-all solution which will fix most issues.
Invalidate caches: File > Invalidate Cache / Restart > Invalidate
Close IntelliJ.
Delete IntelliJ config files in the project:
Browse to the project folder.
Find the .iml file in the project root and delete it.
Find the .idea folder in the project root and delete it.
Reopen the project in IDEA.
Invalidate and restart IDEA: File > Invalidate Cache / Restart > Invalidate & Restart
Code Reference Info:
https://www.jetbrains.com/help/idea/viewing-reference-information.html