[Bug] `YouTube.com` OAuth2 fails to connect, returning “This app is blocked”.

#### What The Problem Is

At [`itch.io/user/settings/connected-accounts#connected_accounts_9652132`](https://itch.io/user/settings/connected-accounts#connected_accounts_9652132:~:text=in%20with%20Twitter-,Twitch,-Sign%20in%20with), if I `click()` `//button[text()="Sign in with YouTube"]`, the process consistently fails:

https://github.com/user-attachments/assets/352a0932-b1e6-4d02-83f8-ef07dac2c23d

<details>

Specifically, I am `location.assign`'d to:

1. [`https://accounts.google.com/v3/signin/accountchooser?access_type=offline&approval_prompt=force&client_id=507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com&redirect_uri=https%3A%2F%2Fitch.io%2Flogin-with-youtube&response_type=code&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fyoutube.readonly&dsh=S-1121490306%3A1771715754068650&o2v=1&service=lso&flowName=GeneralOAuthFlow&opparams=%253F&continue=https%3A%2F%2Faccounts.google.com%2Fsignin%2Foauth%2Fdelegation%3Fauthuser%3Dunknown%26part%3DAJi8hAOqewwVmpywbu6Wg7RF5FMEWEaJJxomwPJa5xao5SV1V0sFtAMi1cnNG55j4Duqg2boNMa241WacwCf24LlRDFNpSCSYR_C3XfECwqIFa8tq3m6vj_SpdyozaZEDFMOPi9ooRWeqE3k5R95kEYhLcyOlXwp663JJCVZBlRRTZiZphA4p97USrNGuDb0lJUHgqTd2prxXEmtQ9D1JqxZ94X9zwP5PI9M7kqw9UdaAFXQ6nREnrtLijYUFZ2kfVgG56sUirlVmJqIVNva01pyh_y-FGKHW7c7MUquGqajMy-cCcjowtM89RqwN2epaY0UquBgJF3MwqNh1jU1mIHw3Xv07Zfyj1dwT_gvdLIKkTpK6-MTwus4IVnr81hC9E7whPFZqDrpQfATiUs3NM7cyXx7IAjy0BPcH-OX9GoKTLgry1g0XeUWdGnlN4O0hIzHrWPfUBO1%26flowName%3DGeneralOAuthFlow%26as%3DS-1121490306%253A1771715754068650%26client_id%3D507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com%23&app_domain=https%3A%2F%2Fitch.io`][1]

1. [`https://accounts.google.com/signin/oauth/delegation?authuser=0&part=AJi8hAOqewwVmpywbu6Wg7RF5FMEWEaJJxomwPJa5xao5SV1V0sFtAMi1cnNG55j4Duqg2boNMa241WacwCf24LlRDFNpSCSYR_C3XfECwqIFa8tq3m6vj_SpdyozaZEDFMOPi9ooRWeqE3k5R95kEYhLcyOlXwp663JJCVZBlRRTZiZphA4p97USrNGuDb0lJUHgqTd2prxXEmtQ9D1JqxZ94X9zwP5PI9M7kqw9UdaAFXQ6nREnrtLijYUFZ2kfVgG56sUirlVmJqIVNva01pyh_y-FGKHW7c7MUquGqajMy-cCcjowtM89RqwN2epaY0UquBgJF3MwqNh1jU1mIHw3Xv07Zfyj1dwT_gvdLIKkTpK6-MTwus4IVnr81hC9E7whPFZqDrpQfATiUs3NM7cyXx7IAjy0BPcH-OX9GoKTLgry1g0XeUWdGnlN4O0hIzHrWPfUBO1&flowName=GeneralOAuthFlow&as=S-1121490306%3A1771715754068650&client_id=507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com&pli=1&rapt=AEjHL4NTQ6CSBogIRRa19daKKid3AVyow6su99FP9ZFvzZvHgQ-Y28IcXJSFhDIf5GJ3Mf0xpsO9eIZYpe3vb0TSA7QEb8kibPbcUFzT8i0p1_4iiBckP9c`][2]

1. [`https://accounts.google.com/signin/oauth/warning?authuser=0&part=AJi8hANlz1QF_RYZwCLha9opjQcvSytLlAQyFEMkRpigPbr4usM8uD8oH-gQzMtwFWiFonWtg88rz7Khss7-aJHbBo6uV_Ogc6AmYRmmZs8ZAjbNGxFshcOYCgZZ3s5vlSXMDKdVJSwx6XyrFJTJwHd98vym5yDxFl-5G7M8_6XmAEhOuzdSq3B9LcD7BLJKvK_h2GvqHayDDLaAXr162PsJpn7A0I9dbLK0NsRGz7o5KSHRGAeeNs2cyd0tb_WPXCjB_zg4Scm-cFwzdGPeD72lsCDRqiW2FrPLwkmLVaj31mftuJd1bRmP04GjCE_cdy64UU7CyYx0LI8UG2qDyn2EGQb_iPuREpJ3qni8krXo5Mg-UqhYcBYxZTnrrsdyUYG3FC3GkNeCFjUNca9poczXy_fWdVhzIvdkTAtLE4OQ_pOh2NSJ-To6CwbjogWaKCZOgGINyCl0PNmRyQqkL_fz_bEFcCq-hg&flowName=GeneralOAuthFlow&hl=en-GB&as=S-1121490306%3A1771715754068650&client_id=507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com&rapt=AEjHL4NTQ6CSBogIRRa19daKKid3AVyow6su99FP9ZFvzZvHgQ-Y28IcXJSFhDIf5GJ3Mf0xpsO9eIZYpe3vb0TSA7QEb8kibPbcUFzT8i0p1_4iiBckP9c#:~:text=This%20app%20is%20blocked,safe%2C%20Google%20blocked%20this%20access%2E`][3]

[1]: https://accounts.google.com/v3/signin/accountchooser?access_type=offline&approval_prompt=force&client_id=507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com&redirect_uri=https%3A%2F%2Fitch.io%2Flogin-with-youtube&response_type=code&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fyoutube.readonly&dsh=S-1121490306%3A1771715754068650&o2v=1&service=lso&flowName=GeneralOAuthFlow&opparams=%253F&continue=https%3A%2F%2Faccounts.google.com%2Fsignin%2Foauth%2Fdelegation%3Fauthuser%3Dunknown%26part%3DAJi8hAOqewwVmpywbu6Wg7RF5FMEWEaJJxomwPJa5xao5SV1V0sFtAMi1cnNG55j4Duqg2boNMa241WacwCf24LlRDFNpSCSYR_C3XfECwqIFa8tq3m6vj_SpdyozaZEDFMOPi9ooRWeqE3k5R95kEYhLcyOlXwp663JJCVZBlRRTZiZphA4p97USrNGuDb0lJUHgqTd2prxXEmtQ9D1JqxZ94X9zwP5PI9M7kqw9UdaAFXQ6nREnrtLijYUFZ2kfVgG56sUirlVmJqIVNva01pyh_y-FGKHW7c7MUquGqajMy-cCcjowtM89RqwN2epaY0UquBgJF3MwqNh1jU1mIHw3Xv07Zfyj1dwT_gvdLIKkTpK6-MTwus4IVnr81hC9E7whPFZqDrpQfATiUs3NM7cyXx7IAjy0BPcH-OX9GoKTLgry1g0XeUWdGnlN4O0hIzHrWPfUBO1%26flowName%3DGeneralOAuthFlow%26as%3DS-1121490306%253A1771715754068650%26client_id%3D507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com%23&app_domain=https%3A%2F%2Fitch.io

[2]: https://accounts.google.com/signin/oauth/delegation?authuser=0&part=AJi8hAOqewwVmpywbu6Wg7RF5FMEWEaJJxomwPJa5xao5SV1V0sFtAMi1cnNG55j4Duqg2boNMa241WacwCf24LlRDFNpSCSYR_C3XfECwqIFa8tq3m6vj_SpdyozaZEDFMOPi9ooRWeqE3k5R95kEYhLcyOlXwp663JJCVZBlRRTZiZphA4p97USrNGuDb0lJUHgqTd2prxXEmtQ9D1JqxZ94X9zwP5PI9M7kqw9UdaAFXQ6nREnrtLijYUFZ2kfVgG56sUirlVmJqIVNva01pyh_y-FGKHW7c7MUquGqajMy-cCcjowtM89RqwN2epaY0UquBgJF3MwqNh1jU1mIHw3Xv07Zfyj1dwT_gvdLIKkTpK6-MTwus4IVnr81hC9E7whPFZqDrpQfATiUs3NM7cyXx7IAjy0BPcH-OX9GoKTLgry1g0XeUWdGnlN4O0hIzHrWPfUBO1&flowName=GeneralOAuthFlow&as=S-1121490306%3A1771715754068650&client_id=507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com&pli=1&rapt=AEjHL4NTQ6CSBogIRRa19daKKid3AVyow6su99FP9ZFvzZvHgQ-Y28IcXJSFhDIf5GJ3Mf0xpsO9eIZYpe3vb0TSA7QEb8kibPbcUFzT8i0p1_4iiBckP9c

[3]: https://accounts.google.com/signin/oauth/warning?authuser=0&part=AJi8hANlz1QF_RYZwCLha9opjQcvSytLlAQyFEMkRpigPbr4usM8uD8oH-gQzMtwFWiFonWtg88rz7Khss7-aJHbBo6uV_Ogc6AmYRmmZs8ZAjbNGxFshcOYCgZZ3s5vlSXMDKdVJSwx6XyrFJTJwHd98vym5yDxFl-5G7M8_6XmAEhOuzdSq3B9LcD7BLJKvK_h2GvqHayDDLaAXr162PsJpn7A0I9dbLK0NsRGz7o5KSHRGAeeNs2cyd0tb_WPXCjB_zg4Scm-cFwzdGPeD72lsCDRqiW2FrPLwkmLVaj31mftuJd1bRmP04GjCE_cdy64UU7CyYx0LI8UG2qDyn2EGQb_iPuREpJ3qni8krXo5Mg-UqhYcBYxZTnrrsdyUYG3FC3GkNeCFjUNca9poczXy_fWdVhzIvdkTAtLE4OQ_pOh2NSJ-To6CwbjogWaKCZOgGINyCl0PNmRyQqkL_fz_bEFcCq-hg&flowName=GeneralOAuthFlow&hl=en-GB&as=S-1121490306%3A1771715754068650&client_id=507810471102-59nqpjpj7t5hqpvi04vn8s2k1s0rbl7r.apps.googleusercontent.com&rapt=AEjHL4NTQ6CSBogIRRa19daKKid3AVyow6su99FP9ZFvzZvHgQ-Y28IcXJSFhDIf5GJ3Mf0xpsO9eIZYpe3vb0TSA7QEb8kibPbcUFzT8i0p1_4iiBckP9c#:~:text=This%20app%20is%20blocked,safe%2C%20Google%20blocked%20this%20access%2E

</details>

…whereupon I observe:

<img width="636" height="356" alt="Image" src="https://github.com/user-attachments/assets/d6ce9db0-abee-4a50-b54f-c11d7e968798" />

#### My Accounts

- #### `X.com`

 [`i/user/3782186368`](https://x.com/i/user/3782186368)

- #### `Itch.IO`

 [`profile/rokejulianlockhart`](https://itch.io/profile/rokejulianlockhart)

#### My Environment

<blockquote>

~~~YAML
Name : firefox-nightly
Version : 149.0a1
Release : 20260221090124
Architecture: x86_64
Install Date: Sat 21 Feb 2026 19:36:48 GMT
Size : 377529361
Signature : (none)
Source RPM : firefox-nightly-149.0a1-20260221090124.src.rpm
Build Date : Sat 21 Feb 2026 10:58:01 GMT
Build Host : 1dffce543d26
Vendor : Mozilla
~~~

</blockquote>

#### Reposts

[`itch.io/t/5984035/3-oauth-connections-are-inoperable`](https://itch.io/t/5984035/3-oauth-connections-are-inoperable)

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[Bug] `YouTube.com` OAuth2 fails to connect, returning “This app is blocked”. #1871

What The Problem Is

My Accounts

`X.com`

`Itch.IO`

My Environment

Reposts

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

[Bug] YouTube.com OAuth2 fails to connect, returning “This app is blocked”. #1871

Description

What The Problem Is

My Accounts

X.com

Itch.IO

My Environment

Reposts

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions

[Bug] `YouTube.com` OAuth2 fails to connect, returning “This app is blocked”. #1871

`X.com`

`Itch.IO`