Hello and thanks for your detailed troubleshoot strategy @tbg.
Yes, after a long week struggling with my main program I was able to install it from AUR. I have not done any change to the system nor its configuration, this is a standard Garuda KDE Lite installation. No other desktop. Garuda detected my Win 7 that I only use to run the Intel SSD Diagnostic Tool to check the health of the SSD every 6 months. Win 7 runs on a partition in another disk a HD WD Caviar Black. Garuda left MX16 boot option, but I marked Garuda Installer to completely format the SSD, only Garuda runs on the SSD, MX16 boot option can not work, MX16 was erased. I did not touch the boot, it was configured by Garuda.
I only Installed the following 5 programs via Pamac in this order:
1. LibreOffice-fresh 7.0.1-1 and its Spanish language pack from Official Repositories. (Works fine) Installed Friday 14 September 2020.
2. Virtualbox 6.1.14-1 Official Repositories Installed 15 September 2020. (Works fine)
3. Google-Chrome 85.0.4183.121-1 from Chaotic-AUR (Tabs crashes randomly)
4. CherryTree 0.39.4-1 from AUR Installed 16 September 2020. (Works fine)
5. KeepNote 0.7.8-4 from AUR (Works fine) Installed 19 September 2020.
That is all.
Thanks for any idea.