Purple boxes on conquered zone

Any time you conquer a zone there are purple boxes (I think they should represent text?).
I attached some screenshots in the attachments.

Operating System: Manjaro linux KDE
- Kernel: 5.5.7-1-MANJARO
- Qt Version 5.14.1
- KDE Plasma Version: 5.17.5
System Specs
- CPU: Intel i7-6700 CPU (8 x 3.40 Ghz)
- GPU: GeForce GTX 1660
- RAM: 16Gb
Game Version
- Steam v1.01-11100
Steps to reproduce: conquer any zone.
No output_log.txt found in Besiege/Besiege_Data.