Menu headings are displayed as rectangles (LO / OSX Sierra)

Don’t know what to do to solve this issue; all menu headings are displayed as rectangles. Screenshot:

Please have a look at and report, whether that helps.

thnx for assisting, but it didn’t solve the issue … Looks like L.O. can’t load some UI font, but I don’t know how to analyse that.

Next tries. (1) Go to Tools > Options > LibreOffice > Fonts and replace this unsuitable font with a better font. But I do not know, whether this affects dialogs or only documents. (2) Go to Tools > Options > LibreOffice > Advanded > Expert Configuration. Find the property “IsSystemFont” in branch org.openoffice.Office.Common/Accessibility. Click on “true” to toggle it to “false”. It seems, that only bold text is affected. Has your font a file for bold? Which UI font do you use?