SSRS - Managing Folder, GET AllowedActions Method Returns 404

I'm using SQL Server 2017 Reporting Service and I see that something is wrong with my permissions. I'm in the Administrator group in the SSRS machine, I can manage most of the folders in the SSRS browser web app but I can't manage some of them...

For example,

• I newly created a folder called CWB, I can manage the CWB folder's own permissions
• When I navigate into the CWB folder, I can't manage folders or permissions inside of the CWB folder

Then I realized that when I clicked to manage button on the folder, SSRS sent GET request called AllowedActions and the request returned with users permitted actions, so I examined the body of that request and found this,

For the CWB folder, I get the permissions successfully AllowedActions method returns Status: (200),

But when I navigate into the CWB folder and try to manage another folder inside of the CWB folder, AllowedActions method returns Status: (404) as seen below,

And the error message says,

An error has occurred. Something went wrong. Please try again later.

Other group members of the Administrator can manage/edit the same folder/folders except me. I will very much appreciate it if anyone helps me to fix this issue.

Thank you for reading my issue.

According to this article,

Encoding should be the problem. So try and look at your browser language. Changing your broweser language to English will fix your problem.