Can't change my card language en masse

Hello, I try to change my commander deck from french language to japanese language (despite I scanned all my cards in japanese, they turned to be considered as french. When I want to turn my whole deck in japanese I get this error : 5657b951fae95974c0ae872135c41e9e
I tried to unselect cards which do not have a japanese version and it doesn't seem to work either.