How do I turn error tooltips back on

Make sure you don't have Power Save mode enabled in the File menu and the highlighting level is set to Inspections:

Ctrl+F1 will display the error details.

Thanks, it looks like those settings are correct though. Power save mode is off and the highlighting level is at "Inspections".

Please share the complete IDE window screenshot and clarify what pop-up no longer appears.

If it doesn't work for any specific inspection, make sure this inspection is not disabled or suppressed: https://www.jetbrains.com/help/idea/disabling-and-enabling-inspections.html .

It looks like after closing the tab and reopening it, I'm getting the expected tooltip again.

I'm not sure what changed but I'm once again seeing tooltips like this upon hovering. Thanks.

This happened to me as well, I stopped getting tooltips on hover for any inspections. That is, some inspection would cause a symbol to be underlined as per usual, but hovering the mouse over the underlined symbol would not result in a tooltip.

I have no idea what caused them to stop showing, but closing the IDE and opening again fixed it.

So there's a bug there somewhere that I assume will be very hard to pin down!

Version info:

IntelliJ IDEA 2021.3.3 (Ultimate Edition)
Build #IU-213.7172.25, built on March 16, 2022
Licensed to David Gilbertson
You have a perpetual fallback license for this version.
Subscription is active until December 13, 2022.
Runtime version: 11.0.14.1+1-b1751.46 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11 10.0
GC: G1 Young Generation, G1 Old Generation
Memory: 2048M
Cores: 20
Registry:
    search.everywhere.actions=false
    search.everywhere.toolwindows=false
    search.everywhere.configurations=false
    ide.tooltip.initialDelay=712
    ide.balloon.shadow.size=0





Non-Bundled Plugins:
    org.toml.lang (213.5744.224)
    org.sylfra.idea.plugins.linessorter (1.0.1)
    org.jetbrains.plugins.rest (213.5744.190)
    ideanginx9 (0.1.9)
    com.jetbrains.plugins.ini4idea (213.5744.190)
    com.intellij.plugins.watcher (213.6461.19)
    com.intellij.ideolog (203.0.27.0)
    org.intellij.plugins.postcss (213.5744.190)
    com.github.shiraji.emoji (3.1.0)
    com.dubreuia (2.3.0)
    intellij.prettierJS (213.7172.5)
    com.intellij.lang.jsgraphql (3.1.2)
    Pythonid (213.7172.26)
    ru.meanmail.plugin.requirements (2022.3-2021.3)
    ru.adelf.idea.dotenv (2022.1)





Kotlin: 213-1.5.10-release-949-IJ7172.25

David Gilbertson let us know if you find a sequence of actions that cause that.

For some reason my tooltips on hover stopped as well

Tyler D Please contact support at https://intellij-support.jetbrains.com/hc/requests/new and attach the video of the issue. Also provide the logs using Help | Collect Logs and Diagnostic Data.

This is also happening to me, I restarted and the tooltips comeback.  I'll look to file a ticket with the debug logs