Comment to Page is broken after Update to 15.0.0-A1
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Here we go: Assuming that you have access to your UNA database, please go to the 'sys_modules' table, find the row of the module giving you that error. It's probably the 'Post - Articles - News Ticker' module from Jerome, based on the 'MzTicker' in the error message you posted. I am not quite sure.
Then, in the 'enabled' column/field, change the value from 1 to 0 to disable the module.