@Maxpyne forget that this not solved nothing.

i trying to send captcha but captcha no is in IMG is in script, i make whit selenium to get screenshot the four digts is always have the captcha.
i take 4 screenshots to get captcha.
the captcha is 6771
example: https://prnt.sc/q1i8s6
and other problem is OB save screenshot very small in 24 x 24 and got error when try to solve captcha.
any way to save a little bigger.
but now have problems to send in postdata this four digits,thanks in advance.

If you want I can tell you the site in private so you can check.

this is i said,site use PBKDF2 and many acc have 6 and 7 chars long.
i using in php whithout problems but whit OB i need use only passwords whit more than 8 chars long to can get the 8 bytes. and all password whit 6 or 7 chars long OB give error,u convert the pass in base 64 and the not have the 8 bytes needs OB to can make hash correct.

bro the salt i send is base 64 u not need convert again.
MTIzNDU2 is 123456 in base64.

please convert to hex.

pass: 123456, base64 = MTIzNDU2 is the salt

no sorry. i send pass whit 6 long i convert to base64 to send in salt,
and OB give error not have 8 bytes.
please try u self to send this pass 123456
convert to base 64,and add to salt and try.

yes when u use a pass whit 6 long example pass: xxxxxx
the salt OB said not have 8 bytes,
sorry i not talk correct english.

my config is correct,this problem happen only whit passwords 6 or 7 long.
config not problem i got a lot hits but cant use acc whit passwords have 6 or 7 long.
whit output in hex.
correct 8 long.
https://prnt.sc/pwm52f
incorrect 6 long.
https://prnt.sc/pwm5ie