I/O (std) error: Failed to fetch player profile

[qwrrty]

Please confirm the following.

• I checked the existing issues for duplicate problems
• I have tried resolving the issue using the support portal
• I have ensured my Modrinth App installation is up to date

What version of the Modrinth App are you using?

0.10.30

What operating systems are you seeing the problem on?

MacOS

Describe the bug

When I click the button to sign in and enter my email and password for my Microsoft account, I get the popup that says:

An error occurred

I/O (std) error: Failed to fetch player profile

• I have consulted the "Minecraft sign in issues" page. It does not address this error message.
• I have reviewed each of the other bugs on this topic that have been closed, and not found a path that resolves this problem.
• I have successfully launched Minecraft from the official Minecraft Launcher while logged in to this account, so a Minecraft profile should exist.
• My Minecraft profile page shows "Minecraft Java edition" and "Minecraft Bedrock edition" both with a "Learn more" link rather than "Buy now".
• I have attempted logging in through a hotspot on my phone.
• I have uninstalled the Modrinth App and reinstalled, after removing the following support directories for good measure:
  • ~/Library/WebKit/ModrinthApp
  • ~/Library/Preferences/ModrinthApp.plist
  • ~/Library/HTTPStorages/ModrinthApp.binarycookies
  • ~/Library/Caches/ModrinthApp

I am happy to look for logs that may shed more details on the problem.

Steps to reproduce

1. Launch Modrinth App.
2. Click "Select Account" in the upper right of the window.
3. Click the green arrow next to "Not Signed In".
4. Enter my credentials for my Microsoft Minecraft account.
5. The error message appears.

Expected behavior

Expected login to be successful.

Additional context

No response

[qwrrty]

Update: Tonight, I launched the Mojang Minecraft launcher again, and this time when I clicked "Play Java" it prompted me to create a username:

When I chose an unused username and clicked "Confirm", it displayed a modal window saying "Creating your Minecraft profile". I am now able to log in to Modrinth.

I was already logged in to my Minecraft account and I spent several hours playing the game three nights ago, on February 21. I do not understand how I was able to play the game earlier without apparently creating a Minecraft profile. Apparently the "Minecraft profile" differs from the https://www.minecraft.net/en-us/msaprofile page. Perhaps this accounts for some of the confusion other users have had with this error.