Not sure which versions you are using, but you can try:
pragma solidity >=0.4.0 <0.8.0;
Also, I see you had to use datadir to start. Maybe try full path to your file. Not sure of folder name and location where you keep it, maybe try something like:
iele.compile(’…/FolderName/inbox.sol’)
Otherwise check if you have an updated version. If not follow instructions in this link Mallet end to end tutorial
It seems to be caused by an expired SSL cert. I opened an issue here:
You can prepend the call to ./mallet with NODE_TLS_REJECT_UNAUTHORIZED=0 to be able to connect to it, but it looks like requestFunds() isn’t working because of a recent pull request. See