Don't work with the latest version of the Metamask extension

[in19farkt]

Metamask no longer inject Web3 into the global https://docs.metamask.io/guide/provider-migration.html#replacing-window-web3. This leads to an error when trying to connect Metamask on the contract/operations page.

Workaround:

1. open developer tools
2. past code snippet, and press "Enter"

   (function(d, script) {
     script = d.createElement('script');
     script.type = 'text/javascript';
     script.async = true;
     script.src = 'https://unpkg.com/@metamask/legacy-web3@latest/dist/metamask.web3.min.js';
     d.getElementsByTagName('head')[0].appendChild(script);
   }(document));

3. go to Contract/Operations page and connect Metamask