CORS issue

Question

I am developing an application, which uses bitbucket APIs. My browser returns a CORS exception. How can I resolve that?
It was working before, The issue raised recently.

When I searched for the issue, I can see several solutions saying for adding more header information. 
Unfortunately, It didn't solve my problem.
I've attached the screenshot, from my console.

I am using flutter for my web application development. Please help me to solve this.

Jeroen De Raedt · Answer

Hi @Adnan Vallippadan,

thanks for bringing this issue to our attention! We identified the issue that was affecting your integration - and this now has been patched.

Please let us know if you are still experiencing issues.

Ulrich Kuhnhardt _IzymesCo_ · Answer

I came across a similar issue and filed https://ecosystem.atlassian.net/browse/ECOHELPPUB-37 - however Atlassian stated that the affected endpoints were internal.