Beautiful pattern. But there are a few errors in the last few rows when you are putting the shell pattern in. Hopefully the designer fixes them especially for the Crocheters who don’t know how to adjust as they crochet.

My suggestions. Instead of working 60 even, just work even , doing just 60 made it tight. I think I ended up with 70. That doesn’t affect the pattern on the bottom.
Round 41, the first ‘DC’ it says to skip is actually a SC.
Round 42, you’re doing TC into the TC, not into a DC.
Round 44, you’re doing TC into a TC not a DC.
Round 45, you’re skipping a SC not a DC.
I also only chained 2 when it said 3, and 3 when it said 4 on the turning chains. That was my preference not necessariliy an error. Just thought it layed nicer. Beautiful though. :)