Error in tax code page


I opened settings and then the following things shown in my screenshot appeared.

Then i clicked on the transaction of a tax code than this appeared-

And then i clicked refresh page then this error appeared. Please Help

before posting on the forum, please always update to the latest version and check if the problem persists.

Sorry, it was my mistake that i did not check my version.
I updated the software and its fine now.
Thanks for the help