Need help," amaranth-regular-webfont.svg" blocked upload

Since today, I’m not able to publish (upload) my website anymore. I did not make any changes at the RapidWeaver 5.3.2 or at the settings, but the upload of the page within the data file "amaranth-regular-webfont.svg“ is not responding anymore. I instantly need to end „RapidWeaver“ by pressing „alt —> termination“ otherwise the whole program would get blocked.

Your quick help is very much appreciated, thank you!

Mac OSX 10.11.1
RapidWeaver 5.3.2
Theme: Infinity 1.8