Check for upgrade is KO

[ludovicandrieux]

Hi,

When i use "Check for updates" in the plugins page, this plugin have no response.

In the HTTP request, i see a response for your plugin but with no version.

Informations about my redmine instance

Environment:
  Redmine version                4.1.1.stable
  Ruby version                   2.5.5-p157 (2019-03-15) [x86_64-linux-gnu]
  Rails version                  5.2.4.2
  Environment                    production
  Database adapter               PostgreSQL
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                sendmail
SCM:
  Git                            2.20.1
  Filesystem                     
Redmine plugins:
  redmine_agile                  1.5.3
  redmine_checklists             3.1.17
  redmine_custom_workflows       1.0.2
  redmine_lightbox2              0.5.1

Best regards