Login issues after WP-united implementation

Hi!

I have a problem after the implementation of WP-United.

1. Registering from WordPress
2. Going to phpBB forum
3. Trying to login through forum login page/form
4. As a result I get an error page, that the password is wrong
5. I go back to wp part, login passes successfully.
6. After i do remind password on phpBB side it works correctly
7. But if i do remind password on wp side it gives me the same error on phpBB side.

Any advise?

https://ww.wp.xz.cn/plugins/wp-united/