Hi,
I appears that an older version of Peaceful SeaBlock has messed up the Mod Portal because of invalid dependencies. This was a mistake on my end and I have solved this by removing older versions of the mod from the Mod Portal.
This was all due to a bug in the older version of my mod. so I uploaded a fix, but the older version still kept invalidating the response from the Mod Portal.
I believe that the way the Mod Portal and the game deal with these situation are not very robust and can be improved. I will report this to the developers. thanks for telling me about this.