Reactions not showing up with FLATBOOTS style

I have downloaded and installed reactions and the FLATBOOTS styles (for both "core" and the "reactions" styles folder). However, after installation, there is no reaction button showing up, as seen in the attached screen.

Any idea why? I am on latest FLATBOOTS and phpBB 3.3.10

Thanks.

[IvanPF]

Hi,

Have you tried clearing the cache from the ACP?

Yes sir. I have cleared cache from ACP and also cleared browser cache for testing.

[IvanPF]

I just tested with the latest version of flatboots (3.3.4) and everything seems fine.

Is there any way I can see the error directly in your forum with a test account or similar?

See the screenshots. When I switch to proflat, mouse over the reaction button shows me all the emojis I configured.
However, if I switch to FLATBOOTS, mouse over the reaction button does nothing. Also, the button looks different too. I don't know why.

For reactions in the posts prior to the installation of FLATBOOTS, the emojis seem to show a broken link. They show up fine in proflat theme.

Sorry I don't have a guest account for you to use. If it's a must-have to fix this issue, I will do some research to see how to create a guest account.

[IvanPF]

Can you provide me a list/capture with the extensions you have installed?

Yes. Please see screenshot.
I did use to run an extension, don't remember the name exactly but I think it's called postreactions by steve, here is the link:
https://www.phpbb.com/community/viewtopic.php?t=2615851

I have since deleted it, but I think something has been left in the theme code even after I deleted that extension from the server.

Here is the inspection on the reactions button between FLATBOOTS and proflat:

Any advice or insight?