Lightroom Classic Masking tool

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.

/Follow-up/ Posted this reply just as you were posting your fix, so please ignore.

Let me move this to the Lightroom Classic forum for you, which is the appropriate forum for your question.

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