@AmazOuz just letting you know I've installed the free version of Emerald and I'm having the login issue described in this thread:
https://community.mybb.com/thread-218460.html
According with the solution posted by Wires in post #3 there's a missing line in member_login template:
Quote:If you've reinstalled a fresh version of 1.8.16 and reimported your backed up theme, then it's your templates that need updating, as said in all of those threads you've read that you haven't found a solution in. Add the following in your member_login template:
Find:
<input type="hidden" name="url" value="{$redirect_url}" />
None
Add underneath:
<input name="my_post_key" type="hidden" value="{$mybb->post_code}" />
I don't know if it's just me or it is related just to the free version of your theme, but I'm letting you know in case it isn't.
EDIT:
Also,
header_welcomeblock_guest template misses connected=0 variable:
<script>
var connected = 0;
</script>
I had to add it manually as I couldn't see Register/Login links when browsing via mobile.