Delete app on NextCloudPi / White screen no dashboard

Hi I recently enabled untested an app while in the App Store. External storage app and now my next cloud site is white and no login or dashboard

I still can get in the cloudpi dashboard.

I know in other platforms I would just go into the apps folder and delete it.

Is there a way to do that on the cloudpi?

I think just need to disable it and/ or delete it.

Thank you,

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