Unable to edit styles
Zotero came with a limited number of styles shown on the Style Manager, beginning with "American Chemical Society" and ending with "Vancouver." From your repository I downloaded "Acupuncture in Medicine." This is now shown on the Style Manager and works properly with the manuscript. However, I am trying to rename and edit it, but it is not shown on the Zotero Style Editor. The only styles shown on the editor are the originals that came with the program. Yet even those I am unable to edit. I select them in the Style Manager, hit the Style Editor button, but the message at the bottom of the Zotero Style Editor says "No items selected in Zotero." Please help. Computer is MacBook Air with MacOS Catalina 10.15.7 and using Firefox.
Upgrade Storage
Beyond that: https://www.zotero.org/support/dev/citation_styles/style_editing_step-by-step