unable to mount \'system ext' (block device required)

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• [x] I am running an official build of TWRP, downloaded from https://twrp.me/Devices/
• [x] I am running the latest version of TWRP
• [x] I have read the FAQ (https://twrp.me/FAQ/)
• [x] I have searched for my issue and it does not already exist

Device codename: oneplus 7t pro TWRP version: latest

WHAT STEPS WILL REPRODUCE THE PROBLEM?

download latest version of magisk and try installing it with android 10 installed #### WHAT IS THE EXPECTED RESULT? installation succesful #### WHAT HAPPENS INSTEAD? unable to mount \'system ext' (block device required) #### ADDITIONAL INFORMATION

/tmp/recovery.log: dmesg: