Invalid descendent file name "". and .htaccess not shown

Hi,

So this one's a 2-parter.

Most importantly; I get the following error on my remote server, completely out of the blue:'Invalid descendent file name "".'
Now, I'm working on this project from seperate pc's. It's working 100% perfectly fine on every PC except (suddenly) the one I'm working on it with right now.
This error just came out of the blue.

What I've tried so far:

- remove and add the deployment
- go back to the root (instead of httpdocs), which works, but if I try to open httpdocs I get the same error again.
- Try to upload a file from a different PC -- works perfectly fine, So it's a local issue.



Problem #2
I just can't get PHPStorm to show me my .htaccess files, which is quite annoying, really... Any help would be appreciated :) (I'm pretty sure it used to until 2016.2) 

Edit:
Another PC is now showing the file descendent error.

Edit 2:

The invalid descendent error has been fixed.
Apparently PHPstorm, at one point, decided to create a nameless folder. I only realised this after logging into the FTP with filezilla (with which I still couldn't do anything with it) so I deleted it through linux. This fixed the issue of the invalid descendent