When you click on the button nothing happens.
Steps to Reproduce:
1. Go and click on the Insert Text Box button
2. Move the cursor to the slide
A special cursor appears that allows you to select the location to insert a text box.
User Profile Reset: Yes
User-Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0
Repro with Groupedbar.
Arch Linux 64-bit
Build ID: 1390c91c7584a89298906849cdabae131f8a6191
CPU threads: 8; OS: Linux 4.14; UI render: default; VCL: kde4;
Locale: fi-FI (fi_FI.UTF-8); Calc: group threaded
Built on December 14th 2017
*** Bug 114436 has been marked as a duplicate of this bug. ***
Thanks for the bug report. It was already fixed and will work in LibO 6.1.