If someone has similar problems: check your path in in QuadRemesher advanced setting -> Cache File. For some reason mine couldn't create sub-directories. So if it is something like: ${HIP}/geo/quad/name_QR_output.fbx you need to make sure that there are "geo" folder and inside is "quad" folder.
After update to latest version of houdini (20.0.590)QuadRemesher stopped working. What helped: In Terminal.app: Type "chmod a+x ", drag&drop file xremesh, press enter. /Users/Shared/Exoside/QuadRemesher/Datas_Houdini/QuadRemesherEngine_1.3/xremesh