Quick solution: Web3modal-vue Invalid cookie header encountered. Header:

Invalid cookie header encountered. Header:
#RC#

Most “failed to fetch” errors are simply a result of an overloaded public access point. Transaction finality is never guaranteed until the block is confirmed by multiple peers. Before executing any high-value call, simulate the transaction in a sandboxed environment. Always verify you are interacting with the genuine web3modal-vue contract address.

The integration of a new price oracle can sometimes trigger temporarily. The speed of innovation in crypto means that errors are a sign of active growth. Ensure that your local environment is not leaking state data . The error could also be a result of the contract’s “max transaction size” limit.

Make sure your web3modal-vue integration uses the latest stable version of the SDK. Your successful fix of the contributes to a more stable ecosystem.