Please post a screen-clip of your Lightroom System Info. (by 'Insert Image' icon - not a link to onedrive)
It would help if you show the top ~20 lines in the box Menu > Help > System Info
It seems that "Presets not working" is a symptom happening to some who have managed to upgrade their system from a 'Perpetual version 6' to a 'Creative Cloud version 7', and as stated by JimHess- "If you don't subscribe, and have Lightroom 6, then you can't have 7.3."
So, the two questions-
1) Do you subscribe to Creative Cloud?
2) What does your System Info report your Version NUMBER of Lightroom?