The annotator feature won't work if the remote computer uses Wayland. To use annotations in Zoho Meeting, ensure that Wayland is disabled.
Here's what you could do to establish the remote connection with the Linux computer.
To disable Wayland :
Zoho Meeting's Annotator feature cannot be used in Fedora OS 25 and above, if Wayland is enabled instead of Xorg. You can use annotator by disabling Wayland.
Open file /etc/gdm/custom.conf in a text editor.
Uncomment the line: "#WaylandEnable=false" (remove the # before the line).
Save the file and reebot the system.