Rescan / Initializing infinite loop

[Charles7]

After looking at the Minimstreamer | Properties webpage, then back to the Minimserver Status webpage, it displays:

Profile error setting property stream.converter: Exception while setting property stream.converter to : java.lang.NullPointerException

and nothing happens when I click on Rescan

(I have long had a license and had ffmeg.exe in C:\Users\<nam>\AppData\Roaming\MinimServer\opt\bin )

Also, the Minimserver | License webpage now says

You are using MinimServer Starter Edition.

But when I go to Minimiserver | License | Activate webpage and enter my license code and email address, the similar error message appears:

Profile error setting property stream.converter:
Exception while setting property stream.converter to opt/bin/ffmpeg: java.lang.NullPointerException