System.FormatException: Input string was not in a correct format

new to Duplicati. Trying a simple Music folder backup local to OneDrive. The process appears to finish bugreport.zip (2.9 KB)
but at the end issues this obtuse error: System.FormatException: Input string was not in a correct format. Log files ZIP attached.

Is this simply a Beta issue? Maybe the advanced settings I selected? A little help.

Thanks, Brian

It is most likely a parsing error somewhere, but the bugreport does not log the error. After you see the error, can you try to look in the “log” area (“Show logs” from the left-side menu) and see if there is more information? (Click on each item to expand it).