Cloning in sourcetree results in 'Login failed due to incorrect login credentials or method. remote'

[Norlina_S]

unable to clone a remote repo with error 'This in not a valid source path'

[Ben]

G'day Norlina! 

Thank you for contacting Bitbucket Cloud Support.

The most common issue customers are experiencing related to authentication in SourceTree is due to the deprecation of GIT username/password in favour of App Passwords:
https://bitbucket.org/blog/deprecating-atlassian-account-password-for-git-and-bitbucket-api-activity
We have a blog post however which explains the steps to troubleshoot this issue, please follow these accordingly and this should resolve the issue:
https://community.atlassian.com/t5/Sourcetree-articles/Bug-Fix-Sourcetree-for-Windows-authentication-error-when/ba-p/1965968

You will need to make use of an AppPassword for communicating to GIT via HTTPS.
We have documentation for usage of app passwords at the following link:
https://support.atlassian.com/bitbucket-cloud/docs/app-passwords/#Create-an-app-password

Essentially, when connecting via HTTPS you will use your App Password alongside your username seperated with a ":" character.

Therefore if you are authenticating to GIT over HTTPS to push/pull you will need to update your remote URL's to include the App Password:

git remote set-url origin https://USERNAME:APP_PASSWORD@bitbucket.org/workspaceID/reposlug.git

The same applies when performing git clone:

git clone https://USERNAME:APP_PASSWORD@bitbucket.org/workspaceID/reposlug.git

I would suggest ensuring also that all stored passwords related to authentication over GIT are cleared from your machine (ie Credential Manager for Windows, Access Keychain for Mac or /etc/shadow folder for Linux).

Hope this helps.

Cheers!

- Ben (Bitbucket Cloud Support)