Can't reply to earlier messages

Hi,

I am trying to reply to my earlier topics:

https://premium.wpmudev.org/forums/topic/membership-member-progression-problem#post-238516
https://premium.wpmudev.org/forums/topic/will-upgrading-membership-solve-this#post-234282

but the reply box is not present. Therefore I cannot reopen the topic either.
Please advise,
Alex

P.S. Think I posted this topic yesterday as well but couldn't find it anymore.