I’ve got the same on one of my apps.
Failed: error validating ‘mongodb-atlas’ service: expected ‘uri’ to be a ‘string’, but instead found a ‘null’
@Zuhair_Ahmed it is using the " App Services GitHub Integration " rather than a custom terraform/3rd party script.
It seems like if i commit anything from the UI it updates GitHub correctly however anything which is committed into GitHub is then rejected by Atlas. (even something as trivial as a comment in a function)