MD5 indicated in: https://developer.arm.com/-/media/Files/downloads/gnu/11.3.rel1/binrel/arm-gnu-toolchain-11.3.rel1-mingw-w64-i686-arm-none-eabi.zip.asc
is: f1ff0b48304dbc4ff558f0753a3a8860
Downloding this file: https://developer.arm.com/-/media/Files/downloads/gnu/11.3.rel1/binrel/arm-gnu-toolchain-11.3.rel1-mingw-w64-i686-arm-none-eabi.zip
Calculated MD5: b287cf60045910dd56c56cdc2a490049
Looks like the "arm-gnu-toolchain-11.3.rel1-mingw-w64-i686-arm-none-eabi.zip.asc" file, still linked in https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads , is not longer accessible: https://developer.arm.com/-/media/Files/downloads/gnu/11.3.rel1/binrel/arm-gnu-toolchain-11.3.rel1-mingw-w64-i686-arm-none-eabi.zip.asc?rev=90180faccd664e4a83365a1d5fa4bb89&hash=527F7CBF958C7F1C2E435ABE8E7B3DC11D17DE67
But no replacement file has been added to the downloads page?
The sha2567asc file, which Oreste mentions is also not working (I haven't tested it myself) is still there though.