What is your operating system?
What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Can you repeat the problem? If so, what are the steps?
(Please be specific and use the names as seen in Shotcut, preferably English. Include a screenshot or screen recording if you can. Also, you can attach logs from either View > Application Log or right-click a job and choose View Log.)
Trying to drag a video into Shotcut just produces a no-go symbol and Shotcut is completely unusable. I cannot repeat the problem, because I fixed it already.
Here is the solution to the problem. I am using the portable version, however, it is not completely portable and it writes to the registry. Initially, I tried deleting Shotcut and downloading the zip file again and reinstalling Shotcut. But this did not work and I still couldn’t add a video to Shotcut, so I figured that Shotcut was writing something to the registry.
In order to fix the problem, close Shotcut, then run regedit in administrator mode and search for and delete the Meltytech key. Reopen Shotcut and it will now work.
I have only just started using Shotcut, so I have a lot to learn and I frequently have to search how to do “simple” things that experienced users would find easy.