502 Relay error: json: key must be a string at line 1 column 2

[dreamsOverlord]

After updating the code and updating the application, I get this error when trying to access a website:

502
Relay error: json: key must be a string at line 1 column 2

[88888Z]

when you are updating code.gs then also use the corresponding version of client in same release with the code.gs file that you deployed

[therealaleph]

This matches the Code.gs v1.9.28 JSON regression in #1245. The fix is merged in #1265 and v1.9.29 is building.

Use the corrected assets/apps_script/Code.gs, save it in Apps Script, and deploy a New version. The client and Code.gs should come from the same release, but the key detail here is that the deployed Apps Script version must actually be updated.

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Answered via LLM, Supervised @therealaleph

[therealaleph]

Duplicate of #1245; fixed by #1265.