Error trying to generate report, any type

I’ve run a test suite and when I try to generate a report (html, csv, pdf) I get an error:
An internal error occurred during: “Export test suite report”.
com.fasterxml.aalto.WFCException: Illegal character (NULL, unicode 0) encountered: not valid in any content
at [row,col {unknown-source}]: [84556,2]

I’ve searched around and see some similar posts (that are old) that suggest to increase memory in the ini file; I tried that, that doesn’t do anything for me. Looking for suggestions, thanks!

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