E2fsck shows errors - device has red warning - reported available space is negative

I clicked on the “Scan DIsk” utility. After it completed - it said there were errors, however it didn’t attempt to fix any of them.
Now the free space tool on the main admin page shows “Free space -13243287483” nonsense.
The shares are still available.
Is there a procedure to run e2fsck in the repair mode? It looks like the gui isn’t doing it.
Can this be fixed or should I reformat the md volume and start over?

Any help would be greatly appreciated!