Hi,
That is very strange, I have not seen this error before. I would re upload the file:
/Setup/applications/mojoportal-core/SchemaInstallScripts/mssql/2.2.7.8.config
if that file is missing it may try to run this one instead and it could cause that error:
/Setup.applications/mojoportal-core/SchemUpgradeScripts/mssql/2.2.7.8.config
Hope it helps,
Joe