Infura outage halted exchange erc20 and ethereum withdrawl, so if you are unable to withdraw erc20 or ethereum it's because of this issue, the main cause is the old ethereum node Geth
https://decrypt.co/47846/ethereum-backbone-infura-suffers-major-damageSo what exactly is infura?
Infura - infura helps developers to have space for development imagine downloading 109GB for blockchain instead infura handles those so that
developers can focus in their projects, also it communicates to the blockchain, and returns it to you and interpret it
- also is responsible for running metamask
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https://infura.io/product,
https://infura.io/faq