error using mrp_flattened_bom_xlsx version 11.0

[andreampiovesana]

error using mrp_flattened_bom_xlsx version 11.0
Uncaught SyntaxError: Failed to execute 'open' on 'Window': Unable to open a window with invalid URL ...
also the runbot is not with xlsx examples
i tryed to develop a module like the example in https://github.com/OCA/reporting-engine/tree/11.0/report_xlsx but the browser give the same error.

[github-actions]

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