Problem: When testing HTTP requests for completed API for AWS email service in Insomnia, I was receiving proper responses on pagination tokens. Pagination tokens consist of various symbols (numbers/letters/others). But when QA from my team decided to test that service, they were receiving InvalidNextTokenException error despite using fresh tokens that were given to them from previous requests.
Solution: Apparently, various software for testing HTTP requests (so far that I found were Intellij Idea and Postman) were mutating the token data, changing all + symbols to ' ' blank spacebars symbols, which caused InvalidNextTokenException. While testing using Insomnia resulted in expected behavior.