Hi @sapna soni - This is bit strange but it usually happens when you are not subscribed to that space or community - to reply you check on the top if you have joined that community or might have accidentally left it : See for example - I have not joined this community - it only allows me to see the threads, recommend contents but no reply options:
When you are replying to a question (Not a Discussion thread) - You need to go on the top and press answer button - it doesn’t have reply option to particular response like in discussion threads.
Try leaving that space and rejoining it - If it doesn't work at all : write an email to 'support@blueprism.com'
Regards
Mukesh
