validator-stats VS substrate-open-working-groups

It's not part of the current Polkadot runtime, so you won't see the minimum stake at this point. You could calculate it out approximately what it will be by e.g. running https://github.com/w3f/validator-stats, parsing out all nominator amounts, sorting, and looking for spot #20_000.

This number fluctuates every era, and the most recent and up to date version can be found out using this community-developed tool or through these scripts which you can run on your machine. See the Election Solution Set section on the Nominator page for more details.

To see these figures and more on your own, you can run the validator-stats script here: https://github.com/w3f/validator-stats

Right now you have to run the validator-stats script and look for "Lowest minimal nominator". https://github.com/w3f/validator-stats

Polkadot Developer Community - Official community forum to discuss Substrate, PolkadotJS, and building cross-chain dApps.

And of course you can always develop your own blockchain with Substrate to support it.

A great framework for building your own blockchain, and use numerous off-the-shelf modules, with Substrate - https://substrate.dev/

If you're interested in developing yourself, check out substrate.dev.

Assuming you are working through the substrate.dev tutorials I have just had this same problem as worked around it by reverting the node template to the `polkadot-v0.9.25` tag.

Well. Polkadot created substrate (substrate.dev) which is a framework for building a blockchain, with a lot of general components to make it easy to "plug-and-play" your customizable blockchain. I tried using their "Getting Started" guide to spin up "my own blockchain", it was done within an hour or so.

Check out https://substrate.dev/ !

Substrate is not a chain; it's the default address style, named after the Substrate development framework which virtually all (if not all) parachains are currently built with. https://substrate.dev/

Do contact the Substrate project (basis of the Polkadot/Kusama project), which is based in Berlin. You can contact them on their channel (see their website on http://substrate.dev), they're friendly and many of them are native German speakers.