Complete button issues

I finished the task but the complete button is unable to click on it. It is seen in grey.
Regards,
Eliana Scasserra

Dear Eliana,

Thank you for your message.

Could you please advise if this issue has been solved? If not, could you please provide me with the corresponding project name or number?

Kind regards,
Maria

Dear Eliana,

Could you please advise how is this going? Was this issue solved?

Kind regards,
Maria