Hi Mayibongwe, I just installed LR 1.2.3 from your Google Drive (clean install - I haven't had LR installed on this computer before).
I installed it via Preferences > Plugins, and it correctly created this folder for me:
C:\Users\MyUsername\AppData\Roaming\MusicBee\mb_LyricsReloaded
The I copied the additional provider files to the \providers subfolder.
When I restarted MusicBee and went to Preferences > Tags (2), it shows all of the additional lyric providers there, from A-Z Lyrics Universe to Song Lyrics, except SongTexte, which ironically is the one I want to use. I have no idea why though.
Songtexte.yml is definitely inside the \providers subfolder, but it's simply not there in the Lyrics Providers dialog.
Any idea why? Can you check that it's still showing up on your own Lyrics Providers dialog, using the latest Songtexte.yml file?