Error when trying to convert a file to page

[Deleted user]

A bunch of JS console errors seem to prevent us from using the addon:

Mixed Content: The page at 'https://rebelpenguin.atlassian.net/' was loaded over HTTPS, but requested an insecure script 'http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js'. This request has been blocked; the content must be served over HTTPS. create:1 
Mixed Content: The page at 'https://rebelpenguin.atlassian.net/' was loaded over HTTPS, but requested an insecure script 'http://cdnjs.cloudflare.com/ajax/libs/sinon.js/1.15.4/sinon.js'. This request has been blocked; the content must be served over HTTPS. create:1

Uncaught SyntaxError: Unexpected end of JSON input
 at JSON.parse (<anonymous>)
 at XMLHttpRequest.requestDone (create?content.id=498139140&space.key=AC&dialog=1&simpleDialog=1&user_id=pavel.savchenko&user_key=8a7f8083610bd6b301611d60f90e02a8&tz=Europe%2FBerlin&loc=en-GB&xdm_e=https%3A%2F%2Frebelpenguin.atlassian.net&xdm_c=channel-com.atlassian.confluence.pandocconnect__import-document-confluence-pandoc-connect&cp=%2Fwiki&xdm_deprecated_addon_key_do_not_use=com.atlassian.confluence.pandocconnect&lic=none&cv=1.168.0&jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiI4YTdmODA4MzYxMGJkNmIzMDE2MTFkNjBmOTBlMDJhOCIsInFzaCI6ImM5OTBhZWY0N2U1N2YyYTNkNjY3NzZiNmVkMGYxYzZiMjYzZGQ4NTc4ZDMxOTBjNGQ5OGY5MmMxYTViY2NmMGIiLCJpc3MiOiJDb25mbHVlbmNlOjcwNjk3ODg3MTgiLCJjb250ZXh0Ijp7InVzZXIiOnsiYWNjb3VudElkIjoiNWE2NWJhOWFlMDIwMmU0NjUyMGY2Yzk0IiwiZGlzcGxheU5hbWUiOiJQYXZlbCBTYXZjaGVua28iLCJ1c2VyS2V5IjoiOGE3ZjgwODM2MTBiZDZiMzAxNjExZDYwZjkwZTAyYTgiLCJ1c2VybmFtZSI6InBhdmVsLnNhdmNoZW5rbyJ9fSwiZXhwIjoxNTM3MjAxODY2LCJpYXQiOjE1MzcyMDE2ODZ9.kLUnMIfbGnxOuCNKDCL8L1EwZIJYSK77FBUEhgKrvGw:263)

requestDone @ create?content.id=498139140&space.key=AC&dialog=1&simpleDialog=1&user_id=pavel.savchenko&user_key=8a7f8083610bd6b301611d60f90e02a8&tz=Europe%2FBerlin&loc=en-GB&xdm_e=https%3A%2F%2Frebelpenguin.atlassian.net&xdm_c=channel-com.atlassian.confluence.pandocconnect__import-document-confluence-pandoc-connect&cp=%2Fwiki&xdm_deprecated_addon_key_do_not_use=com.atlassian.confluence.pandocconnect&lic=none&cv=1.168.0&jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiI4YTdmODA4MzYxMGJkNmIzMDE2MTFkNjBmOTBlMDJhOCIsInFzaCI6ImM5OTBhZWY0N2U1N2YyYTNkNjY3NzZiNmVkMGYxYzZiMjYzZGQ4NTc4ZDMxOTBjNGQ5OGY5MmMxYTViY2NmMGIiLCJpc3MiOiJDb25mbHVlbmNlOjcwNjk3ODg3MTgiLCJjb250ZXh0Ijp7InVzZXIiOnsiYWNjb3VudElkIjoiNWE2NWJhOWFlMDIwMmU0NjUyMGY2Yzk0IiwiZGlzcGxheU5hbWUiOiJQYXZlbCBTYXZjaGVua28iLCJ1c2VyS2V5IjoiOGE3ZjgwODM2MTBiZDZiMzAxNjExZDYwZjkwZTAyYTgiLCJ1c2VybmFtZSI6InBhdmVsLnNhdmNoZW5rbyJ9fSwiZXhwIjoxNTM3MjAxODY2LCJpYXQiOjE1MzcyMDE2ODZ9.kLUnMIfbGnxOuCNKDCL8L1EwZIJYSK77FBUEhgKrvGw:263
load (async)
sendData @ create?content.id=498139140&space.key=AC&dialog=1&simpleDialog=1&user_id=pavel.savchenko&user_key=8a7f8083610bd6b301611d60f90e02a8&tz=Europe%2FBerlin&loc=en-GB&xdm_e=https%3A%2F%2Frebelpenguin.atlassian.net&xdm_c=channel-com.atlassian.confluence.pandocconnect__import-document-confluence-pandoc-connect&cp=%2Fwiki&xdm_deprecated_addon_key_do_not_use=com.atlassian.confluence.pandocconnect&lic=none&cv=1.168.0&jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiI4YTdmODA4MzYxMGJkNmIzMDE2MTFkNjBmOTBlMDJhOCIsInFzaCI6ImM5OTBhZWY0N2U1N2YyYTNkNjY3NzZiNmVkMGYxYzZiMjYzZGQ4NTc4ZDMxOTBjNGQ5OGY5MmMxYTViY2NmMGIiLCJpc3MiOiJDb25mbHVlbmNlOjcwNjk3ODg3MTgiLCJjb250ZXh0Ijp7InVzZXIiOnsiYWNjb3VudElkIjoiNWE2NWJhOWFlMDIwMmU0NjUyMGY2Yzk0IiwiZGlzcGxheU5hbWUiOiJQYXZlbCBTYXZjaGVua28iLCJ1c2VyS2V5IjoiOGE3ZjgwODM2MTBiZDZiMzAxNjExZDYwZjkwZTAyYTgiLCJ1c2VybmFtZSI6InBhdmVsLnNhdmNoZW5rbyJ9fSwiZXhwIjoxNTM3MjAxODY2LCJpYXQiOjE1MzcyMDE2ODZ9.kLUnMIfbGnxOuCNKDCL8L1EwZIJYSK77FBUEhgKrvGw:250
submit @ create?content.id=498139140&space.key=AC&dialog=1&simpleDialog=1&user_id=pavel.savchenko&user_key=8a7f8083610bd6b301611d60f90e02a8&tz=Europe%2FBerlin&loc=en-GB&xdm_e=https%3A%2F%2Frebelpenguin.atlassian.net&xdm_c=channel-com.atlassian.confluence.pandocconnect__import-document-confluence-pandoc-connect&cp=%2Fwiki&xdm_deprecated_addon_key_do_not_use=com.atlassian.confluence.pandocconnect&lic=none&cv=1.168.0&jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiI4YTdmODA4MzYxMGJkNmIzMDE2MTFkNjBmOTBlMDJhOCIsInFzaCI6ImM5OTBhZWY0N2U1N2YyYTNkNjY3NzZiNmVkMGYxYzZiMjYzZGQ4NTc4ZDMxOTBjNGQ5OGY5MmMxYTViY2NmMGIiLCJpc3MiOiJDb25mbHVlbmNlOjcwNjk3ODg3MTgiLCJjb250ZXh0Ijp7InVzZXIiOnsiYWNjb3VudElkIjoiNWE2NWJhOWFlMDIwMmU0NjUyMGY2Yzk0IiwiZGlzcGxheU5hbWUiOiJQYXZlbCBTYXZjaGVua28iLCJ1c2VyS2V5IjoiOGE3ZjgwODM2MTBiZDZiMzAxNjExZDYwZjkwZTAyYTgiLCJ1c2VybmFtZSI6InBhdmVsLnNhdmNoZW5rbyJ9fSwiZXhwIjoxNTM3MjAxODY2LCJpYXQiOjE1MzcyMDE2ODZ9.kLUnMIfbGnxOuCNKDCL8L1EwZIJYSK77FBUEhgKrvGw:237
(anonymous) @ all.js:8
h @ all.js:8
(anonymous) @ all.js:77
(anonymous) @ all.js:73
c._anyListener @ all.js:73
(anonymous) @ all.js:84
(anonymous) @ all.js:62
b._handleEvent @ all.js:62
c._receiveMessage @ all.js:17