Folder missing in app

Folder missing in app

Yesterday, via the Web interface I created a new folder to put some of my email into and moved about 8 emails into it.  When I open the Zoho Mail App on my iPhone 8 and look at the folder tree, the folder is not there.  All my other folders are there but not that one. When I log into my email account on the Web, the folder is there.  Any help?