Found a fix from user @Tash_Rockski in topic “Kee not working for all sites except google”
“… Turns out I had an older version of the RPC plugin …
Double check under “Tools > Plugins” that only one KeePassRPC (1.21.1) is listed. If not, you can resize the columns to get the full path of the duplicates, remove them from your file system and restart KP2. …”
This fixed the issue in my case.
Thanks Tash_Rockski for sharing !!