Hello,
We're going to release a patch release with a fix for this in the next couple of days.
Until then, replace the contents of the /setup/application/mojoPortal-core/SchemaUpgradesScripts/MySQL/2.6.0.0.config file with this:
ALTER TABLE `mp_ModuleSettings`
CHANGE COLUMN `SettingValue` `SettingValue` MEDIUMTEXT NULL DEFAULT NULL ;
alter table `mp_ContentMeta`