There are a few problems here, the most pressing is the lack of information.
phpMyAdmin runs on a web server, but it looks like you are using XAMPP, which is a pre-rolled solution for users that might not necessarily know how to configure phpMyAdmin in Linux/Mac/Windows, setup their own solution, or want something easy to deploy. There should be a log file you can grab.
I've never used XAMPP, but I have used phpMyAdmin for decades. Setting up using the default settings XAMPP is installed to "C:\XAMPP".
If I browse to that file I see a directory called "apache" and inside that "logs". This file, "error", should contain the error that will help us determine why your server is having issues with permissions.
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Please send the text from the error file in
"\apache\logs".
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This might be a bug with XAMPP, phpMyAdmin, your configuration, or something else. Paste the errors from the log file and I will be happy to look at them. I can't solve your problem with the information you have provided, but hopefully this will help point you in the right direction.