Blockchain gets stucked if no blocks are mined
In my ignorance I'm going to assume it is normal: how do I fix it without having to delete everything and making a new chain?


You can just comment out or remove the check in getblocktemplate so it won't error there.

You should also be able to bypass this by setting your computer's clock to around the time of the most recent block before you start the software. Once it has started, you can bring your computer's clock back to real time and then mine a block.