Maximum # of Tags?

What is the maximum number of tags this plugin will allow?

I’m asking because another trial user indicated he could use no more than 15 tags, total:
> https://www.ads-software.com/support/topic/problem-with-showing-more-then-15-tags-in-cloud/

With my thanks in advance,
Metta

The page I need help with: [log in to see the link]