UPDATE:
Did try to change the rpc url, but problem still is there. 
old
Did take a break from smart contract development for a month. Today I wanted to connect truffle to mumbai. It will connect, but will continue to throw this error:
It literally will not let me do anything. migrations fail and the console just continues to spit out the same error. I did update all packages, including hdwallet provider.
This really leaves me puzzled 
Cannot find anything online. Can someone enlighten me please?
require("babel-register");
require("babel-polyfill");
//const { mnemonic } = require('./secrets.json');
const HDWalletProvider = require("truffle-hdwallet-provider");
//const mnemonic = process.env.MNEMONIC;
const mnemonic =
"....";
var networkId = process.env.npm_package_config_ganache_networkId;
var gasPrice = process.env.npm_package_config_ganache_gasPrice;
var gasLimit = process.env.npm_package_config_ganache_gasLimit;
module.exports = {
networks: {
development: {
host: "127.0.0.1",
port: 7545,
network_id: 5777, //networkId
gas: 6500000, //gasLimit
gasPrice: 25000000000, //gasPrice
},
matic: {
provider: () =>
new HDWalletProvider(mnemonic, `https://rpc-mumbai.matic.today`),
network_id: 80001,
confirmations: 2,
timeoutBlocks: 200,
skipDryRun: true,
},
},
contracts_directory: "./src/contracts/src/",
contracts_build_directory: "./src/contracts/abis/",
migrations_directory: "./src/contracts/migrations/",
compilers: {
solc: {
version: "0.8.0", //change from 0.6.12 to 0.8.0, reason: f. e. safemath is now native, also: since Istanbul fork, transfer is deprecated!
optimizer: {
enabled: true,
runs: 200,
},
},
},
// Only to enable when wanting to test gas because otherwise it slows down the tests A LOT
// mocha: {
// reporter: "eth-gas-reporter",
// },
};
Code to reproduce
Environment
Truffle