jenkins integration - Jenkins url can't be blank

Hello.

Could be please help me how to find out what is the issue?

I'm trying to configure jenkins integration but I get:

The form contains the following errors: Jenkins url can't be blank Jenkins url must be a valid URL Project name can't be blank

Although I set jenkins url and project name

Components GitLab 13.8.1 (7248f8bff5a)

GitLab Shell 13.15.0

GitLab Workhorse v8.59.0

GitLab API v4

Ruby 2.7.2p137

Rails 6.0.3.4

PostgreSQL 12.4

Redis 5.0.9