No t5humbnail in audio Kden live

[Douglas Pollard]

I am getting Error reading audio thumbnail. When I click on Audio thumb 
nails in Kdenlive in 18.12.1 . I installed Kdenlive  on xubuntu Mint.  
On another drive Xubuntu studio I was desperate enough to uninstall mint 
and studio and reinstall both with a knew Kdenlive on each after few 
hours of editing I lost the thumb nail on both again. Any help would be 
appreciated thanks.  Douglas Pollard