hello there i have a very annoying issue with audacity projects ive saved on my PC and urgently i want your help in that case every time i tried to reopen my saved projects i got a pop up message says " this program can’t start because wxmsw30u_qa_vc_custom.dll is missing from your computer. try reinstalling thr program to fix this problem
Audacity
: 
Have you tried, as the error message suggests, re-installing the Audacity app.
The latest version is 2.2.1 - and you can get it from here: https://www.audacityteam.org/download/
Update: I just checked my installation of 2.2.1 on my W10 laptop and that dll certainly comes as part of the download.
WC
I usually google for the driver, download and install it, to fix such problems.
Win 10 is supposed to do that automatically but if not then just DIY.
It is a little odd when it fails…
Virus software?
Koz