Enabling plugins breaks the header and main menu in Hueman Theme

Hi and thank u for your great plugin. I want to use One click Accessibility with Hueman Theme but when i enable the plugin it breaks menu and a part of header.
The toolbar icon is 52px and after enabling i see a gap in header and menu (i think the same height).
please check: https://dide-new.lef.sch.gr/
When i deactivate plugin everything comes back to normal.
Thank u very much

No files or tests are named. Reproduce the issue on the linked site with the Hueman Theme and One Click Accessibility enabled, then compare the header and main menu with the plugin deactivated. Done means the 52px toolbar icon no longer creates a gap or breaks the header and menu.

Written by the indexing model from the issue text.