Metamask Error: Uncathed Typeerror: Web3 is not a builder
When you find an error like “Uncated Typeerror: Web3 is not a builder” when trying to connect to your metamask wallet to a blockchain site, you are probably dealing with version incompatibility or incorrect library configuration. This article will guide you by solving problem problems.
Understanding the error message
The error message indicates that Web3.JS (the JavaScript library used to interact with Blockchain Ethereum) is unable to establish a connection with its metamask wallet. Specifically, you are complaining that the Web3 is not a builder.
Version questions: a potential guilty
The version of your web3.js library being used (^1.3) may be the culprit behind this problem. Although you mentioned the version, there are some differences between the versions:
* Web3 v0.4.4 : This is an older version that does not support asynchronous transactions.
* Web3 V1.3.0-2.10.8 : These are newer versions that support asynchronous transactions, but may not work with older metamask versions or some blockchain sites.
Step problem solving
To solve this problem, follow these steps:
1. Check your metamask version
Make sure you are using the latest version of Metamask. Go to the Metamask website ([Metamask] ( and click “Connect” in the upper right corner. This will lead you to your page Metamask portfolio settings.
- Look for the version number (for example,
1.3.0) and update -o, if necessary.
- Wait a few minutes for the web3.js to detect updates as they can sometimes take some time to propagate.
2. Check your blockchain website
Make sure your blockchain website is accessible by Web3.js. Try to access the same site with the connected metamask or without it (if possible). If the problem persists only when metamask is connected, it may be necessary to update your browser settings or consider redefining metamask connection.
3. Update your web3.js library
If you are using an older version of the web3.js (v0.4.4), you can try to update it:
- Install the latest version of NPM:
npm install @ethers -io/web3 @mais recent
- Alternatively, use a packet manager like wires or bower to manage dependencies.
4. Activate asynchronous transactions
If you are using an older version of the web3.js (v1.3.0-2.10.8), it may be necessary to activate asynchronous transactions:
- On the Metamask Settings page, go to “Advanced” and select the option to use asynchronous transactions.
- Wait a few minutes for the changes to go into force.
5. Redefines your metamask connection
If none of the above steps solve the problem, you can try to redefine your metamask connection:
- Close all web3.js instances on your browser or remove all references to it from your code.
- Restart the browser and reconnect with Metamask again.
Conclusion
The “Uncathed Typeerror: Web3 error message is not a builder” usually indicates a problem with the Web3.js library version being used. By following these problem -solving steps, you can solve the problem and successfully connect to your Metamask wallet on the blockchain website.
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