I am trying to complete my UK IS form but constantly getting error for intended date of travel

[alomgir1122]

Right now I’m in the uk.i wanna apply for my dependent.I have entered my work start and work end date as mentioned in my COS document, I am not sure what is the issue with intended date of travel to UK, it is not considering any date, also it is mentioned to leave it blank if we don't know, even if I am leaving it blank it is expecting to fill intended date.

Getting this below message on top

There was a problem submitting the form

Please try the following:

Please enter a valid travel date

Work start
For example, 20 3 1976
Entered date 16 05 2022

Work end
For example, 20 3 1976
Entered date 15 11 2025
If you're applying as someone's dependant, enter their work dates.

Intended date of travel to UK
For example, 20 3 1976
Given date 20 11 2023
Please enter a valid travel date
If you don't know when you're travelling to the UK, leave this blank. The date you applied for your IHS will be used.

Before filling these details, we were asked to fill Visa type, Visa route and visa expiry date. My visa expiry date as per UKVI letter is 29Nov2025