Unable to fund grants when using Argent via WalletConnect

**Describe the bug**
When I click Fund Items button nothing happens in the UI and errors can be seen the dev console.

**To Reproduce**
1) Use WalletConnect to connect to an Argent wallet on phone
2) Add grants to your cart
3) Click `Fund Items`

**Expected behavior**
When clicking `Fund Items` your grants should be processed and tokens removed from your wallet.

**Screenshots**

**Desktop (please complete the following information):**

- OS: MAC OSX Catalina
- Browser: Firefox 78.0.1 & Chrome 83.0.4103.116

**Smartphone (please complete the following information):**

- Device: iphone X
- OS: iOS 13.5.1

**Additional context**

Argent App version 1.1.2(853)

Seems like it could be related to [this WalletConnect issue](https://github.com/WalletConnect/walletconnect-monorepo/issues/256) so maybe an upgrade to WalletConnect would resolve the issue.