[Pharo-users] Instance of ByteArray did not understand #isByteString in ZnUTF8Encoder

Hi there, In Pharo 7.0 I've encountered an error related with the new streams changes ( https://github.com/pharo-open-documentation/pharo-wiki/blob/master/Migration...) while downloading a zip file. Problem is ZnUTF8Encoder expects a String, but my code which worked in Pharo 6 provides a ByteArray. I've isolated it in a reproducible way: | webClient resp | webClient := ZnClient new. UIManager default informUserDuring: [ :bar | bar label: 'Downloading resources for ' , self class printString. [ webClient signalProgress: true; get: ' https://github.com/biosmalltalk/biopharo/raw/develop/test_files/BioSmalltalk...' ] on: HTTPProgress , ZnEntityTooLarge do: [ : ex | (ex isKindOf: ZnEntityTooLarge) ifTrue: [ ex resume ] ifFalse: [ | progress | progress := ex. progress isEmpty ifFalse: [ bar current: progress percentage. progress total ifNotNil: [ :aTotalNumber | bar label: 'Downloading ' ] ]. progress resume ] ] ]. (resp := webClient response) isSuccess ifTrue: [ 'output2.zip' asFileReference writeStreamDo: [ : stream | stream nextPutAll: resp contents ] ] ifFalse: [ self error: 'Cannot download resource files' ]. I also tried using #writeOn: on the response, but that also wrote the response header: self response writeOn: 'test1.zip' asFileReference writeStream. self response writeOn: 'test2.zip' asFileReference binaryWriteStream. HTTP/1.1 200 OK Via: 1.1 varnish Strict-Transport-Security: max-age=31536000 ... PK ¸  D BioSmalltalkTestFiles/PK ½U?+*8!" K / BioSmalltalkTestFiles/A4A7DS6V01S-Alignment.xmlíœks›H †¿à ¯èà ‡©à "’¹_  ¦: 0 R$`ðjSS.,a› Any suggestion? Cheers, Hernán