GeoGebra

ERROR IN SAVING FILE

Author:Wilvard D. Lachica
How can I fix that "unknown char"?
How can I fix that "unknown char"?
How can I fix that "unknown char 12? I don't know where it came from. The file is fixed when I work on geogebra but when I always saved it and drag to a site, it always appear that error. Hoping for your help. Thank you.

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