in cinema grade unable to open effects control when multiple clips selected.

What version of Cinema Grade and what version of InDesign have you got?

Is it all updated to the latest versions?

Does the version of Cinema Grade specify it's compatible with your version of Indesign?
If not you can rollback to a previous InDeisgn version
https://helpx.adobe.com/download-install/using/install-previous-version.html#:~:text=Open%20the%20Creative%20Cloud%20desktop,down%20list%2C%20select%20Other%20Versions.

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What are your system specs and operating system?

Is this updated? 

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Does it work with a single clip or is it just multiple clips?

You could try reset your preferences

Try resetting your preferences:

Windows: Start InDesign, and then press Shift+Ctrl+Alt. Click Yes when asked if you want to delete preference files.
macOS: While pressing Shift+Option+Command+Control, start InDesign. Click Yes when asked if you want to delete preference files.
A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog.
Further info and instructions here if needed:
https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html

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Failing that you'll probably need to contact Cinema Grade support.