Analyzing and Solving Error 907135701 from HMS Core Account Kit - Huawei Developers

907135701 is one of the most frequently reported error codes from HMS Core Account Kit. The official document describes the error as follows.
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Both an Android project and a HarmonyOS project can report this error.
I myself have come across it several times and have summed up some of the causes and solutions for it, as follows.
From an Android Project​Cause 1: The app information is not configured in AppGallery Connect, and the app ID is not generated.
Solution: Configure the app information in AppGallery Connect.
To do this, first register as a Huawei developer and complete identity verification on HUAWEI Developers, as detailed here. Create a project and an app as needed and then obtain the app ID in AppGallery Connect.
Cause 2: The sign certificate fingerprint is not configured or incorrectly configured.
Solution: Verify that the fingerprint configured in AppGallery Connect and the fingerprint used during app packaging are consistent. You can configure the fingerprint by referring to this document.
Cause 3: agconnect-services.json is incorrectly configured, or this file is not placed in the correct directory.
Solution: Verify that the app IDs in agconnect-services.json and AppGallery Connect are the same, and copy the file to the app directory.
Also note that unless necessary, do not toggle on Do not include key in AppGallery Connect.
To re-configure the file, follow the instructions here.
From a HarmonyOS (Java) Project​Cause 1: agconnect-services.json is not placed in a proper directory.
Solution: Move the file to the entry directory.
Cause 2: The sign certificate fingerprint is not configured or incorrectly configured.
Solution: Verify that the fingerprint is configured as specified in Configuring App Signing. After obtaining the fingerprint, verify that it is consistent with that in AppGallery Connect.
Cause 3: The attribute configuration of config.json is incorrect.
Solution: Add the following content to module in the entry/src/main/config.json file of the HarmonyOS app. Do not change the value of name.
Code:
"metaData": {
"customizeData": [
{
"name": "com.huawei.hms.client.appid",
// Replace OAuth Client ID with your actual ID.
"value": "OAuth Client ID" //
}
]
}
Cause 4: The plugin configuration is incorrect.
Solution: Add the AppGallery Connect plugin configuration through either of these methods:
Method 1: Add the following configuration under the declaration in the file header:
Code:
apply plugin: 'com.huawei.agconnect'
Method 2: Add the plugin configuration in the plugins block.
Code:
plugins {
id 'com.android.application'
// Add the following configuration:
id 'com.huawei.agconnect'
}
References​HMS Core Account Kit home page
HMS Core Account Kit Development Guide