For everyone who have had problems with "api-ms-win-crt-runtime-l1-1-0.dll" error.
Firstly, you must download the "api-ms-win-crt-runtime-l1-1-0.dll" from the site below, choose the right version (32 bit or 64 bit) :
https://www.dll-files.com/api-ms-win-crt-runtime-l1-1-0.dll.html
Secondly, access to "C:\Windows\System32" then drag and drop file "api-ms-win-crt-runtime-l1-1-0.dll" in System 32 folder.
Now you can open MetaGate.
If you have another error, give a reply to this post and I will try to help you
Good luck !.