The fatal error is gone in v2.0.1, but it's still not possible to report threads with long titles when the reportIntoForumId option is set to a valid node.
For example, create a thread with the following 150 characters title:
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I see that, but 2.0.1 was released mid December and this was reported as being fixed in the next version on January 5th, so it is reasonable to assume it will be fixed in 2.0.2