Since 20231120 we changed to an npm based creation of the HTML bridge files to include chart.js and its dependencies. The corresponding npm-projects are part of the "eclnt_clientrisc" project, which is part of our GIT repository. Check the project's "npm_chartjs" and "npm_charjs_datalabels" directories.
In case you want to stay with some previous version of the HTML bridge, read corresponding information in the documentation "RISC Developer's Guide - RISC Addons".