There is a discussion in this thread and a fix available at the end of the thread:

https://simple-press.com/support-forum/sp5-general-topics/upgrade-to-5-4-build-10914-messes-up-wordpress-admin-menu/page-2/#p136046

Mike.s said
Hi

the latest update has added a small chat icon in my main wp admin menu???

if i disable simple-press the icons disappear

see screenshot

Hello, your screenshot tool looks great. Could you please tell me the name ?

http://www.screenpresso.com/ its wicked, use it every day

Thank you 

you are welcome…