Unable to add missing zkSync contributions

[nfrgosselin]

Overview
Support is unable to manually add contributions from zkSync through the missing contributions flow.

Steps To Reproduce

1. Go to form
2. Select zkSync as checkout type
3. Enter in wallet address and username (see list below)
4. Hit submit
5. See error

wallet / username examples:

1. 0xbb9ab426bb8c8bb37c7e6eed6a4cb8035f0223f8 / kryptofan
2. 0x307d32f8dfbd60e4c42d67412f3b083de3480036 / nsibacos
3. 0x5778fc4DCA947Bb7D3061747E209d18e8f89B390 / josedeuwu-sudo
4. 0xAF6172a7360c070F544A3e5BC78b344c5DFe4938 / boomga1

Observed behavior
I've seen this error:

Support has seen this error:

Expected behavior
Contribution is added successfully