If copy/paste works, not change useragent; if copy/paste works and you changed useragent, copy/paste will not works; if this situation, just change useragent again as in my previous post.

(MODERATORS, please, add this post to the end of post https://help.zoho.com/portal/en/community/topic/solution-how-to-copy-and-paste-in-zoho-writer-when-ctrl-c-and-or-ctrl-v-not-works   )