[OnePlus 8T Guides, News, & Discussion] sameog:
Here's all the text from the payload using fastbootd:

Please make sure you are in fastbootd, your screen should say 'fastbootd' on top.

Press any key to continue . . .

"lashing... Please report any errors to the thread

target reported max download size of 268435456 bytes

Invalid sparse file format at header magi

target reported max download size of 268435456 bytes

sending 'abl' (1996 KB)...

OKAY [ 0.069s]

writing 'abl'...

FAILED (remote: No such file or directory)

finished. total time: 0.085s

target reported max download size of 268435456 bytes

sending 'aop' (200 KB)...

OKAY [ 0.000s]

writing 'aop'...

FAILED (remote: No such file or directory)

finished. total time: 0.016s

target reported max download size of 268435456 bytes

sending 'bluetooth' (652 KB)...

OKAY [ 0.031s]

writing 'bluetooth'...

FAILED (remote: No such file or directory)

finished. total time: 0.047s

target reported max download size of 268435456 bytes

sending 'boot' (98304 KB)...

OKAY [ 2.561s]

writing 'boot'...

FAILED (remote: No such file or directory)

finished. total time: 2.576s

target reported max download size of 268435456 bytes

sending 'cmnlib' (384 KB)...

OKAY [ 0.016s]

writing 'cmnlib'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

target reported max download size of 268435456 bytes

sending 'cmnlib64' (500 KB)...

OKAY [ 0.022s]

writing 'cmnlib64'...

FAILED (remote: No such file or directory)

finished. total time: 0.038s

target reported max download size of 268435456 bytes

sending 'devcfg' (52 KB)...

OKAY [ 0.016s]

writing 'devcfg'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

target reported max download size of 268435456 bytes

sending 'dsp' (65536 KB)...

OKAY [ 1.806s]

writing 'dsp'...

FAILED (remote: No such file or directory)

finished. total time: 1.821s

target reported max download size of 268435456 bytes

sending 'dtbo' (8192 KB)...

OKAY [ 0.216s]

writing 'dtbo'...

FAILED (remote: No such file or directory)

finished. total time: 0.232s

target reported max download size of 268435456 bytes

sending 'featenabler' (88 KB)...

OKAY [ 0.007s]

writing 'featenabler'...

FAILED (remote: No such file or directory)

finished. total time: 0.022s

target reported max download size of 268435456 bytes

sending 'hyp' (436 KB)...

OKAY [ 0.016s]

writing 'hyp'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

target reported max download size of 268435456 bytes

sending 'imagefv' (20 KB)...

OKAY [ 0.015s]

writing 'imagefv'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

target reported max download size of 268435456 bytes

sending 'keymaster' (252 KB)...

OKAY [ -0.000s]

writing 'keymaster'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

target reported max download size of 268435456 bytes

sending 'logo' (7780 KB)...

OKAY [ 0.216s]

writing 'logo'...

FAILED (remote: No such file or directory)

finished. total time: 0.247s

target reported max download size of 268435456 bytes

sending 'mdm_oem_stanvbk' (4804 KB)...

OKAY [ 0.132s]

writing 'mdm_oem_stanvbk'...

OKAY [ 0.069s]

finished. total time: 0.200s

target reported max download size of 268435456 bytes

sending 'modem' (235980 KB)...

OKAY [ 6.155s]

writing 'modem'...

FAILED (remote: No such file or directory)

finished. total time: 6.171s

target reported max download size of 268435456 bytes

sending 'multiimgoem' (16 KB)...

OKAY [ 0.016s]

writing 'multiimgoem'...

FAILED (remote: No such file or directory)

finished. total time: 0.022s

target reported max download size of 268435456 bytes

sending 'odm' (71108 KB)...

OKAY [ 1.952s]

writing 'odm'...

FAILED (remote: No such file or directory)

finished. total time: 1.968s

target reported max download size of 268435456 bytes

sending 'qupfw' (56 KB)...

OKAY [ 0.007s]

writing 'qupfw'...

FAILED (remote: No such file or directory)

finished. total time: 0.022s

target reported max download size of 268435456 bytes

sending 'recovery' (102400 KB)...

OKAY [ 2.823s]

writing 'recovery'...

FAILED (remote: No such file or directory)

finished. total time: 2.839s

target reported max download size of 268435456 bytes

sending 'spunvm' (348 KB)...

OKAY [ 0.016s]

writing 'spunvm'...

OKAY [ 0.038s]

finished. total time: 0.069s

target reported max download size of 268435456 bytes

sending 'storsec' (20 KB)...

OKAY [ 0.016s]

writing 'storsec'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

target reported max download size of 268435456 bytes

Invalid sparse file format at header magi

target reported max download size of 268435456 bytes

Invalid sparse file format at header magi

target reported max download size of 268435456 bytes

sending 'tz' (3096 KB)...

OKAY [ 0.085s]

writing 'tz'...

FAILED (remote: No such file or directory)

finished. total time: 0.100s

target reported max download size of 268435456 bytes

sending 'uefisecapp' (124 KB)...

OKAY [ -0.000s]

writing 'uefisecapp'...

FAILED (remote: No such file or directory)

finished. total time: 0.016s

fastboot: unknown option -- disable-verity

fastboot: unknown option -- disable-verity

target reported max download size of 268435456 bytes

Invalid sparse file format at header magi

target reported max download size of 268435456 bytes

sending 'xbl' (3404 KB)...

OKAY [ 0.085s]

writing 'xbl'...

FAILED (remote: No such file or directory)

finished. total time: 0.100s

target reported max download size of 268435456 bytes

sending 'xbl_config' (96 KB)...

OKAY [ 0.016s]

writing 'xbl_config'...

FAILED (remote: No such file or directory)

finished. total time: 0.031s

Please reboot to recovery via the menus and wipe everything prior to boot

Press any key to continue . . .