The code executable cannot continue: libgcc_s_seh-1.dll was not found

[Alby]

I have a problem that I cannot solve, When I run the executable of my program it gives me the following error:

"The code executable cannot continue because libgcc_s_seh-1.dll was not found. To fix the problem, try reinstalling the program"

I tried to manually copy and paste the file (libgcc_s_seh-1.dll) into the folder where I keep the executable but I get the following error:

"The application could not be started correctly (0xc000007b)"

Additional information:

• I use windows 10 64 bit
• Use mingw81_64
• I use version 6.1.2 of Qt

What can I solve the problem?