OnePlus 3 update issue

Hey!
I recently switched from Oxygen Open Betas to Freedom OS everything works just fine..but now I would like to go back to Open Beta.
I tried to flash the ROM (OOB 30) via ADB and it didnt work, in command prompt it says "cannot read filename.zip".

I have updated/re-installed the drivers and tried different adb softwares aswell,still no luck!

Any suggestions?


Device: OnePlus 3
Root: Magisk
Recovery: TWRP (also tried stock recovery)

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