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Ι tried to upload a geogebra file to geogrbra tube but i cnt;t save it. When i tried to save it i take the massege:"The base64 data of the GeoGebra applet must not be NULL
The same question 
Ι tried to upload a geogebra file to geogrbra tube but i cnt;t save it. When i tried to save it i take the massege:"The base64 data of the GeoGebra applet must not be NULL
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