Trying to install MediaWiki, getting error: "Tables creation failed. Make sure user can write to schema."

I'm getting the following error when attempting to run the MediaWiki installation, hosted on Heroku, and configured to connect to a Heroku Postgres database:

Tables creation failed. Make sure that the user "xyz" can write to the schema ""

How can I fix this?

Solution

Found the solution - just needed to put a value into the Schema field on the 'Database Connection' wizard page. Any short string value should do; I used: mediawiki.

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