Unable to link a new device to my account

i am using the Xaiomi Mi Box3 with AndroidTV on it i have installed the plex for androidTV from play store
i clicked sign in
gave me a 4 digit code
went to plex.tv/link
input the code

error
Code Not found or expired

tried this 100 times useless

any one knows whats going on why this is happening

i did this for my LG a week ago and it’s fine no issues

Man thanks
i really didn’t know what the reason is until you told me that
they should log this as a bug or add a note for RTL languages