Sorry for one more hunch - but I had a problem installing a wise installation. This was because WISE installed the “font” and thus transmitted the message “with system configuration change”. My DELL had a Dell utility running on it that had a message queue that it did not read, so the installer locked the broadcast. WISE has released a new version for me that, instead of asynchronous broadcasting, fixed the problem. Perhaps your system has an application that does not bother reading its message queue when there is no desktop.
Finally, the answer is: check that you have the latest fixes for your WISE installer. In particular, find fixes that fix locks associated with the window system.
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