[resolved] Nothing happens when clicking submit button

In mine installation, wp with a lot of plugin are in conflicts with USP plugin then when i submit post not happening nothing. So, i had investigate this problem and i resolved it editing file /wp-content/plugins/user-submitted-posts/user-submitted-posts.php in line 99, with a high priority parameter (from 10 (default) to 1):
// third parameter was 10 for default
add_action ('parse_request', 'usp_checkForPublicSubmission');

Now i’ve:
add_action ('parse_request', 'usp_checkForPublicSubmission',1);

I don’t know if this change is correct but i don’t see other problems for now.

P.S. this change will lost with future plugin updates

https://ww.wp.xz.cn/plugins/user-submitted-posts/