Our company has the licensed commercial version of ChimeraX 1.10.1 running on RHEL 8.10. When trying to add the PhenixUI plugin from Toolshed, I get this error:

ERROR: Could not find a version that satisfies the requirement ChimeraX-OpenCommand~=1.16 (from chimerax-phenixui) (from versions: none)
ERROR: No matching distribution found for ChimeraX-OpenCommand~=1.16

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