Error: Lightroom cannot start because there is not enough room on the hard drive named...

[Matthew24834585fena]

Hi, I was on LIghtroom relocating photos and editing earlier and left for a few hours. I came back and tried to open it was alerted "Lightroom cannot start because there is not enough room on the hard drive"  but there is over 100 GB left in the hard drive. Below are two screenshots of when I try to open LR from desktop and when I try to open the backed up catalog from file explorer. PLEASE Help. Idk what I did wrong, this is so frustrating 

[moved from bugs to discussions - Mod.]

[F. McLion]

While having LrC closed, please check if there is a .lock file in the same folder as the catalog (.lrcat).

If yes, delete it and try again.

[GoldingD]

So, your drive C, 100 Gb available. Where is your catalog located? Drive C? If drive C, how much space available in percent? That is %.