Waves plugins not compatible able with new logic x update?

Hi elo1969,

Please try the steps below, as those steps may help to resolve the issue you're encountering:

"Before proceeding, make sure to back up the Logic Pro app.

Try these steps in order 

After trying each step below, test Logic Pro again to see if you've fixed your issue. 

Restart your Mac

Choose Restart from the Apple menu .

Update Logic Pro

Choose Apple menu  > App Store, then click Updates in the toolbar. If a Logic Pro update is available, click the Update button to download and install it.

Check device or software compatibility

If you're using an external audio interface, MIDI interface, storage system, control surface, or plug-in not made by Apple, make sure that it’s compatible with the latest version of Logic Pro. Contact the manufacturer for support. If an update is available, follow the manufacturer’s instructions to update the device or software.

Test with a new project

You can create a new project and test to check if the issue is with your project or Logic Pro app.

1. If Logic Pro is open, quit the app.
2. Open Logic Pro and create a new empty project.
3. Add Apple Loops to the new project.
4. Try to recreate the issue you were having. For example, if the project you're having an issue with uses a particular third-party plug-in, add it to the test project. If the problem reappears, the plug-in might be damaged or might need to be updated."

Those steps are from this article: If Logic Pro isn't working - Apple Support If needed, the article has additional steps you can try to possibly help.

Take care!