
Hi @Raul Lopes,
I would like to know if your Edge version is the latest version. If not, please try to update Edge to the latest version and try again. In addition, since Workspaces and AI Theme Generator are new features recently released by Microsoft Edge, there may be incompatibility issues with Linux Ubuntu. Therefore, based on this, my only suggestion is that you can press "Shift+Alt+I" to submit feedback in Edge.
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Best Regards,
Jinxin Wang