Try this. You unzip it into a folder on your internal sdcard. You install through magisk app. Do not reboot between selections.

zippedvrthemenew.zip | by Tulsadiver for Pixel
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1. Unzip Zip Installer onto your internal sdcard
2. Flash thru Magisk app. Flash the SystemUI Base First. It provides the necessary smali files and public ID's for everything to work
(Do not reboot between selections as Magisk shows after flashing selections. Hit the back button to make your next selection)
3. Go through the other options selecting the mods you want. It is generally best to start at the top and work your way down.
4. Once finished with selections, flash "Complete Installation" at the top. This will install your selections as a Magisk module. Now you reboot.